diff --git a/acceptance/bundle/deployment/bind/vector_search_index/databricks.yml.tmpl b/acceptance/bundle/deployment/bind/vector_search_index/databricks.yml.tmpl
index 3189b712d6b..29692b4450c 100644
--- a/acceptance/bundle/deployment/bind/vector_search_index/databricks.yml.tmpl
+++ b/acceptance/bundle/deployment/bind/vector_search_index/databricks.yml.tmpl
@@ -12,4 +12,7 @@ resources:
       primary_key: id
       index_type: DIRECT_ACCESS
       direct_access_index_spec:
-        schema_json: '{"columns":[{"name":"id","type":"integer"}]}'
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/deployment/bind/vector_search_index/output.txt b/acceptance/bundle/deployment/bind/vector_search_index/output.txt
index db61161ad00..f1b79186906 100644
--- a/acceptance/bundle/deployment/bind/vector_search_index/output.txt
+++ b/acceptance/bundle/deployment/bind/vector_search_index/output.txt
@@ -5,7 +5,7 @@
   "endpoint_type": "STANDARD"
 }
 
->>> [CLI] vector-search-indexes create-index --json {"name":"main.default.test_vs_index_[UNIQUE_NAME]","endpoint_name":"test-vs-endpoint-[UNIQUE_NAME]","primary_key":"id","index_type":"DIRECT_ACCESS","direct_access_index_spec":{"schema_json":"{\"columns\":[{\"name\":\"id\",\"type\":\"integer\"}]}"}}
+>>> [CLI] vector-search-indexes create-index --json {"name":"main.default.test_vs_index_[UNIQUE_NAME]","endpoint_name":"test-vs-endpoint-[UNIQUE_NAME]","primary_key":"id","index_type":"DIRECT_ACCESS","direct_access_index_spec":{"schema_json":"{\"id\":\"integer\",\"vector\":\"array<float>\"}","embedding_vector_columns":[{"name":"vector","embedding_dimension":768}]}}
 {
   "name": "main.default.test_vs_index_[UNIQUE_NAME]",
   "endpoint_name": "test-vs-endpoint-[UNIQUE_NAME]",
diff --git a/acceptance/bundle/deployment/bind/vector_search_index/script b/acceptance/bundle/deployment/bind/vector_search_index/script
index d43578d94c0..3d07efacf93 100644
--- a/acceptance/bundle/deployment/bind/vector_search_index/script
+++ b/acceptance/bundle/deployment/bind/vector_search_index/script
@@ -11,7 +11,7 @@ trap cleanup EXIT
 
 trace $CLI vector-search-endpoints create-endpoint "${ENDPOINT_NAME}" STANDARD | jq '{name, endpoint_type}'
 
-trace $CLI vector-search-indexes create-index --json "{\"name\":\"${INDEX_NAME}\",\"endpoint_name\":\"${ENDPOINT_NAME}\",\"primary_key\":\"id\",\"index_type\":\"DIRECT_ACCESS\",\"direct_access_index_spec\":{\"schema_json\":\"{\\\"columns\\\":[{\\\"name\\\":\\\"id\\\",\\\"type\\\":\\\"integer\\\"}]}\"}}" | jq '{name, endpoint_name, index_type, primary_key}'
+trace $CLI vector-search-indexes create-index --json "{\"name\":\"${INDEX_NAME}\",\"endpoint_name\":\"${ENDPOINT_NAME}\",\"primary_key\":\"id\",\"index_type\":\"DIRECT_ACCESS\",\"direct_access_index_spec\":{\"schema_json\":\"{\\\"id\\\":\\\"integer\\\",\\\"vector\\\":\\\"array<float>\\\"}\",\"embedding_vector_columns\":[{\"name\":\"vector\",\"embedding_dimension\":768}]}}" | jq '{name, endpoint_name, index_type, primary_key}'
 
 trace $CLI bundle deployment bind index1 "${INDEX_NAME}" --auto-approve
 
diff --git a/acceptance/bundle/invariant/configs/vector_search_index.yml.tmpl b/acceptance/bundle/invariant/configs/vector_search_index.yml.tmpl
index bafb1a3cd15..3db7ae2d532 100644
--- a/acceptance/bundle/invariant/configs/vector_search_index.yml.tmpl
+++ b/acceptance/bundle/invariant/configs/vector_search_index.yml.tmpl
@@ -8,10 +8,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     foo:
-      name: test-index-$UNIQUE_NAME
+      name: main.default.test_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.bar.name}
       primary_key: id
-      index_type: DELTA_SYNC
-      delta_sync_index_spec:
-        source_table: main.default.source_$UNIQUE_NAME
-        pipeline_type: TRIGGERED
+      index_type: DIRECT_ACCESS
+      direct_access_index_spec:
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/basic/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/basic/databricks.yml.tmpl
index 768334ee2a6..e16993d7019 100644
--- a/acceptance/bundle/resources/vector_search_indexes/basic/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/basic/databricks.yml.tmpl
@@ -11,10 +11,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     my_index:
-      name: vs-index-$UNIQUE_NAME
+      name: main.default.vs_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.my_endpoint.name}
       primary_key: id
-      index_type: DELTA_SYNC
-      delta_sync_index_spec:
-        source_table: main.default.source_$UNIQUE_NAME
-        pipeline_type: TRIGGERED
+      index_type: DIRECT_ACCESS
+      direct_access_index_spec:
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/basic/out.requests.direct.json b/acceptance/bundle/resources/vector_search_indexes/basic/out.requests.direct.json
index 0d6186c0ec2..c16d428a3f8 100644
--- a/acceptance/bundle/resources/vector_search_indexes/basic/out.requests.direct.json
+++ b/acceptance/bundle/resources/vector_search_indexes/basic/out.requests.direct.json
@@ -2,13 +2,18 @@
   "method": "POST",
   "path": "/api/2.0/vector-search/indexes",
   "body": {
-    "delta_sync_index_spec": {
-      "pipeline_type": "TRIGGERED",
-      "source_table": "main.default.source_[UNIQUE_NAME]"
+    "direct_access_index_spec": {
+      "embedding_vector_columns": [
+        {
+          "embedding_dimension": 768,
+          "name": "vector"
+        }
+      ],
+      "schema_json": "{\"id\":\"integer\",\"vector\":\"array<float>\"}"
     },
     "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-    "index_type": "DELTA_SYNC",
-    "name": "vs-index-[UNIQUE_NAME]",
+    "index_type": "DIRECT_ACCESS",
+    "name": "main.default.vs_index_[UNIQUE_NAME]",
     "primary_key": "id"
   }
 }
diff --git a/acceptance/bundle/resources/vector_search_indexes/basic/output.txt b/acceptance/bundle/resources/vector_search_indexes/basic/output.txt
index d75bfea61db..227aa110ada 100644
--- a/acceptance/bundle/resources/vector_search_indexes/basic/output.txt
+++ b/acceptance/bundle/resources/vector_search_indexes/basic/output.txt
@@ -21,8 +21,8 @@ Resources:
       URL:  [DATABRICKS_URL]/compute/vector-search/vs-endpoint-[UNIQUE_NAME]?o=[NUMID]
   Vector Search Indexes:
     my_index:
-      Name: vs-index-[UNIQUE_NAME]
-      URL:  (not deployed)
+      Name: main.default.vs_index_[UNIQUE_NAME]
+      URL:  [DATABRICKS_URL]/explore/data/main/default/vs_index_[UNIQUE_NAME]?o=[NUMID]
 
 >>> [CLI] bundle deploy
 Uploading bundle files to /Workspace/Users/[USERNAME]/.bundle/deploy-vs-index-[UNIQUE_NAME]/default/files...
@@ -30,11 +30,11 @@ Deploying resources...
 Updating deployment state...
 Deployment complete!
 
->>> [CLI] vector-search-indexes get-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes get-index main.default.vs_index_[UNIQUE_NAME]
 {
-  "name": "vs-index-[UNIQUE_NAME]",
+  "name": "main.default.vs_index_[UNIQUE_NAME]",
   "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-  "index_type": "DELTA_SYNC",
+  "index_type": "DIRECT_ACCESS",
   "primary_key": "id"
 }
 
@@ -51,8 +51,8 @@ Resources:
       URL:  [DATABRICKS_URL]/compute/vector-search/vs-endpoint-[UNIQUE_NAME]?o=[NUMID]
   Vector Search Indexes:
     my_index:
-      Name: vs-index-[UNIQUE_NAME]
-      URL:  (not deployed)
+      Name: main.default.vs_index_[UNIQUE_NAME]
+      URL:  [DATABRICKS_URL]/explore/data/main/default/vs_index_[UNIQUE_NAME]?o=[NUMID]
 
 >>> print_requests.py //vector-search/indexes
 
diff --git a/acceptance/bundle/resources/vector_search_indexes/basic/script b/acceptance/bundle/resources/vector_search_indexes/basic/script
index 54304337425..2e513d8ea6f 100644
--- a/acceptance/bundle/resources/vector_search_indexes/basic/script
+++ b/acceptance/bundle/resources/vector_search_indexes/basic/script
@@ -14,7 +14,7 @@ rm -f out.requests.txt
 trace $CLI bundle deploy
 
 # Get index details
-index_name="vs-index-${UNIQUE_NAME}"
+index_name="main.default.vs_index_${UNIQUE_NAME}"
 trace $CLI vector-search-indexes get-index "${index_name}" | jq '{name, endpoint_name, index_type, primary_key}'
 
 trace $CLI bundle summary
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/databricks.yml.tmpl
index 986f9507e01..43999b39c69 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/databricks.yml.tmpl
@@ -11,10 +11,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     my_index:
-      name: vs-index-$UNIQUE_NAME
+      name: main.default.vs_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.my_endpoint.name}
       primary_key: id
-      index_type: DELTA_SYNC
-      delta_sync_index_spec:
-        source_table: main.default.source_$UNIQUE_NAME
-        pipeline_type: TRIGGERED
+      index_type: DIRECT_ACCESS
+      direct_access_index_spec:
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/output.txt b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/output.txt
index 58cd871d0ed..9b3d7aab90b 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/output.txt
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/output.txt
@@ -7,7 +7,7 @@ Updating deployment state...
 Deployment complete!
 
 === Simulate remote deletion
->>> [CLI] vector-search-indexes delete-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes delete-index main.default.vs_index_[UNIQUE_NAME]
 
 === Plan detects missing resource and proposes creation
 >>> [CLI] bundle plan
@@ -22,11 +22,11 @@ Deploying resources...
 Updating deployment state...
 Deployment complete!
 
->>> [CLI] vector-search-indexes get-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes get-index main.default.vs_index_[UNIQUE_NAME]
 {
-  "name": "vs-index-[UNIQUE_NAME]",
+  "name": "main.default.vs_index_[UNIQUE_NAME]",
   "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-  "index_type": "DELTA_SYNC",
+  "index_type": "DIRECT_ACCESS",
   "primary_key": "id"
 }
 
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/script b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/script
index ae461b4758c..f92a79a1eff 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/script
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/deleted_remotely/script
@@ -1,5 +1,5 @@
 envsubst < databricks.yml.tmpl > databricks.yml
-index_name="vs-index-${UNIQUE_NAME}"
+index_name="main.default.vs_index_${UNIQUE_NAME}"
 
 cleanup() {
     trace $CLI bundle destroy --auto-approve
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/databricks.yml.tmpl
index 1bf224ad2ec..d12336c7e94 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/databricks.yml.tmpl
@@ -11,10 +11,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     my_index:
-      name: vs-index-$UNIQUE_NAME
+      name: main.default.vs_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.vs_endpoint.name}
       primary_key: id
-      index_type: DELTA_SYNC
-      delta_sync_index_spec:
-        source_table: main.default.source_$UNIQUE_NAME
-        pipeline_type: TRIGGERED
+      index_type: DIRECT_ACCESS
+      direct_access_index_spec:
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/output.txt b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/output.txt
index b8c384ba553..7d865eb14ea 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/output.txt
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/output.txt
@@ -28,11 +28,11 @@ Deploying resources...
 Updating deployment state...
 Deployment complete!
 
->>> [CLI] vector-search-indexes get-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes get-index main.default.vs_index_[UNIQUE_NAME]
 {
-  "name": "vs-index-[UNIQUE_NAME]",
+  "name": "main.default.vs_index_[UNIQUE_NAME]",
   "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-  "index_type": "DELTA_SYNC",
+  "index_type": "DIRECT_ACCESS",
   "primary_key": "id"
 }
 
diff --git a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/script b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/script
index b67193c34c9..d3470f38414 100644
--- a/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/script
+++ b/acceptance/bundle/resources/vector_search_indexes/drift/orphaned_endpoint/script
@@ -1,6 +1,6 @@
 envsubst < databricks.yml.tmpl > databricks.yml
 endpoint_name="vs-endpoint-${UNIQUE_NAME}"
-index_name="vs-index-${UNIQUE_NAME}"
+index_name="main.default.vs_index_${UNIQUE_NAME}"
 
 cleanup() {
     trace $CLI bundle destroy --auto-approve
diff --git a/acceptance/bundle/resources/vector_search_indexes/grants/select/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/grants/select/databricks.yml.tmpl
index 855d2f1f141..c0619e93eed 100644
--- a/acceptance/bundle/resources/vector_search_indexes/grants/select/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/grants/select/databricks.yml.tmpl
@@ -16,7 +16,10 @@ resources:
       primary_key: id
       index_type: DIRECT_ACCESS
       direct_access_index_spec:
-        schema_json: '{"columns":[{"name":"id","type":"integer"}]}'
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
       grants:
         - principal: deco-test-user@databricks.com
           privileges:
diff --git a/acceptance/bundle/resources/vector_search_indexes/grants/select/out.requests.direct.json b/acceptance/bundle/resources/vector_search_indexes/grants/select/out.requests.direct.json
index ecfc6b933aa..66c0fe79100 100644
--- a/acceptance/bundle/resources/vector_search_indexes/grants/select/out.requests.direct.json
+++ b/acceptance/bundle/resources/vector_search_indexes/grants/select/out.requests.direct.json
@@ -3,7 +3,13 @@
   "path": "/api/2.0/vector-search/indexes",
   "body": {
     "direct_access_index_spec": {
-      "schema_json": "{\"columns\":[{\"name\":\"id\",\"type\":\"integer\"}]}"
+      "embedding_vector_columns": [
+        {
+          "embedding_dimension": 768,
+          "name": "vector"
+        }
+      ],
+      "schema_json": "{\"id\":\"integer\",\"vector\":\"array<float>\"}"
     },
     "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
     "index_type": "DIRECT_ACCESS",
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/databricks.yml.tmpl
similarity index 54%
rename from acceptance/bundle/resources/vector_search_indexes/recreate/index_type/databricks.yml.tmpl
rename to acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/databricks.yml.tmpl
index 768334ee2a6..e16993d7019 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/databricks.yml.tmpl
@@ -11,10 +11,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     my_index:
-      name: vs-index-$UNIQUE_NAME
+      name: main.default.vs_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.my_endpoint.name}
       primary_key: id
-      index_type: DELTA_SYNC
-      delta_sync_index_spec:
-        source_table: main.default.source_$UNIQUE_NAME
-        pipeline_type: TRIGGERED
+      index_type: DIRECT_ACCESS
+      direct_access_index_spec:
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.create.direct.json b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.create.direct.json
new file mode 100644
index 00000000000..880b58413d4
--- /dev/null
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.create.direct.json
@@ -0,0 +1,23 @@
+{
+  "method": "POST",
+  "path": "/api/2.0/vector-search/indexes",
+  "body": {
+    "direct_access_index_spec": {
+      "embedding_vector_columns": [
+        {
+          "embedding_dimension": 768,
+          "name": "vector"
+        }
+      ],
+      "schema_json": "{\"id\":\"integer\",\"vector\":\"array<float>\"}"
+    },
+    "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
+    "index_type": "DIRECT_ACCESS",
+    "name": "main.default.vs_index_[UNIQUE_NAME]",
+    "primary_key": "id"
+  }
+}
+{
+  "method": "GET",
+  "path": "/api/2.0/vector-search/indexes/main.default.vs_index_[UNIQUE_NAME]"
+}
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.recreate.direct.json b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.recreate.direct.json
new file mode 100644
index 00000000000..ffce16dd741
--- /dev/null
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.requests.recreate.direct.json
@@ -0,0 +1,35 @@
+{
+  "method": "GET",
+  "path": "/api/2.0/vector-search/indexes/main.default.vs_index_[UNIQUE_NAME]"
+}
+{
+  "method": "DELETE",
+  "path": "/api/2.0/vector-search/indexes/main.default.vs_index_[UNIQUE_NAME]"
+}
+{
+  "method": "GET",
+  "path": "/api/2.0/vector-search/indexes/main.default.vs_index_[UNIQUE_NAME]"
+}
+{
+  "method": "POST",
+  "path": "/api/2.0/vector-search/indexes",
+  "body": {
+    "direct_access_index_spec": {
+      "embedding_vector_columns": [
+        {
+          "embedding_dimension": 384,
+          "name": "vector"
+        }
+      ],
+      "schema_json": "{\"id\":\"integer\",\"vector\":\"array<float>\"}"
+    },
+    "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
+    "index_type": "DIRECT_ACCESS",
+    "name": "main.default.vs_index_[UNIQUE_NAME]",
+    "primary_key": "id"
+  }
+}
+{
+  "method": "GET",
+  "path": "/api/2.0/vector-search/indexes/main.default.vs_index_[UNIQUE_NAME]"
+}
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.test.toml b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.test.toml
similarity index 100%
rename from acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.test.toml
rename to acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/out.test.toml
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/output.txt b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/output.txt
similarity index 75%
rename from acceptance/bundle/resources/vector_search_indexes/recreate/index_type/output.txt
rename to acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/output.txt
index 23ac9878b99..0c04db43f89 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/output.txt
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/output.txt
@@ -1,5 +1,5 @@
 
-=== Initial deployment with DELTA_SYNC index_type
+=== Initial deployment
 >>> [CLI] bundle deploy
 Uploading bundle files to /Workspace/Users/[USERNAME]/.bundle/deploy-vs-index-[UNIQUE_NAME]/default/files...
 Deploying resources...
@@ -8,14 +8,8 @@ Deployment complete!
 
 >>> print_requests.py --get //vector-search/indexes
 
-=== Change index_type (should trigger recreation)
->>> update_file.py databricks.yml index_type: DELTA_SYNC index_type: DIRECT_ACCESS
-
->>> update_file.py databricks.yml delta_sync_index_spec: direct_access_index_spec:
-
->>> update_file.py databricks.yml source_table: main.default.source_[UNIQUE_NAME] schema_json: '{"columns":[{"name":"id","type":"integer"}]}'
-
->>> update_file.py databricks.yml pipeline_type: TRIGGERED 
+=== Change embedding_dimension (should trigger recreation)
+>>> update_file.py databricks.yml embedding_dimension: 768 embedding_dimension: 384
 
 >>> [CLI] bundle plan
 recreate vector_search_indexes.my_index
@@ -35,9 +29,9 @@ Deployment complete!
 
 >>> print_requests.py --get //vector-search/indexes
 
->>> [CLI] vector-search-indexes get-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes get-index main.default.vs_index_[UNIQUE_NAME]
 {
-  "name": "vs-index-[UNIQUE_NAME]",
+  "name": "main.default.vs_index_[UNIQUE_NAME]",
   "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
   "index_type": "DIRECT_ACCESS",
   "primary_key": "id"
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/script b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/script
similarity index 62%
rename from acceptance/bundle/resources/vector_search_indexes/recreate/index_type/script
rename to acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/script
index 630628bd3b3..6c994cd4586 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/script
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/embedding_dimension/script
@@ -16,17 +16,14 @@ print_requests() {
     rm -f out.requests.txt
 }
 
-title "Initial deployment with DELTA_SYNC index_type"
+title "Initial deployment"
 rm -f out.requests.txt
 trace $CLI bundle deploy
 
 print_requests create
 
-title "Change index_type (should trigger recreation)"
-trace update_file.py databricks.yml "index_type: DELTA_SYNC" "index_type: DIRECT_ACCESS"
-trace update_file.py databricks.yml "delta_sync_index_spec:" "direct_access_index_spec:"
-trace update_file.py databricks.yml "source_table: main.default.source_${UNIQUE_NAME}" "schema_json: '{\"columns\":[{\"name\":\"id\",\"type\":\"integer\"}]}'"
-trace update_file.py databricks.yml "pipeline_type: TRIGGERED" ""
+title "Change embedding_dimension (should trigger recreation)"
+trace update_file.py databricks.yml "embedding_dimension: 768" "embedding_dimension: 384"
 
 trace $CLI bundle plan
 rm -f out.requests.txt
@@ -34,5 +31,5 @@ trace $CLI bundle deploy --auto-approve
 
 print_requests recreate
 
-index_name="vs-index-${UNIQUE_NAME}"
+index_name="main.default.vs_index_${UNIQUE_NAME}"
 trace $CLI vector-search-indexes get-index "${index_name}" | jq '{name, endpoint_name, index_type, primary_key}'
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.create.direct.json b/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.create.direct.json
deleted file mode 100644
index 00d11a7272f..00000000000
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.create.direct.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "method": "POST",
-  "path": "/api/2.0/vector-search/indexes",
-  "body": {
-    "delta_sync_index_spec": {
-      "pipeline_type": "TRIGGERED",
-      "source_table": "main.default.source_[UNIQUE_NAME]"
-    },
-    "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-    "index_type": "DELTA_SYNC",
-    "name": "vs-index-[UNIQUE_NAME]",
-    "primary_key": "id"
-  }
-}
-{
-  "method": "GET",
-  "path": "/api/2.0/vector-search/indexes/vs-index-[UNIQUE_NAME]"
-}
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.recreate.direct.json b/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.recreate.direct.json
deleted file mode 100644
index c00a4caa79b..00000000000
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/index_type/out.requests.recreate.direct.json
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "method": "GET",
-  "path": "/api/2.0/vector-search/indexes/vs-index-[UNIQUE_NAME]"
-}
-{
-  "method": "DELETE",
-  "path": "/api/2.0/vector-search/indexes/vs-index-[UNIQUE_NAME]"
-}
-{
-  "method": "GET",
-  "path": "/api/2.0/vector-search/indexes/vs-index-[UNIQUE_NAME]"
-}
-{
-  "method": "POST",
-  "path": "/api/2.0/vector-search/indexes",
-  "body": {
-    "direct_access_index_spec": {
-      "schema_json": "{\"columns\":[{\"name\":\"id\",\"type\":\"integer\"}]}"
-    },
-    "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
-    "index_type": "DIRECT_ACCESS",
-    "name": "vs-index-[UNIQUE_NAME]",
-    "primary_key": "id"
-  }
-}
-{
-  "method": "GET",
-  "path": "/api/2.0/vector-search/indexes/vs-index-[UNIQUE_NAME]"
-}
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/databricks.yml.tmpl b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/databricks.yml.tmpl
index b6fde83e7fb..33438f1d351 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/databricks.yml.tmpl
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/databricks.yml.tmpl
@@ -11,9 +11,12 @@ resources:
       endpoint_type: STANDARD
   vector_search_indexes:
     my_index:
-      name: vs-index-$UNIQUE_NAME
+      name: main.default.vs_index_$UNIQUE_NAME
       endpoint_name: ${resources.vector_search_endpoints.my_endpoint.name}
       primary_key: id
       index_type: DIRECT_ACCESS
       direct_access_index_spec:
-        schema_json: '{"columns":[{"name":"id","type":"integer"}]}'
+        schema_json: '{"id":"integer","vector":"array<float>"}'
+        embedding_vector_columns:
+          - name: vector
+            embedding_dimension: 768
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/output.txt b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/output.txt
index f5314dd9a0a..7838a374446 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/output.txt
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/output.txt
@@ -63,12 +63,18 @@ Plan: 1 to add, 0 to change, 1 to delete, 1 unchanged
       "remote_state": {
         "creator": "[USERNAME]",
         "direct_access_index_spec": {
-          "schema_json": "{\"columns\":[{\"name\":\"id\",\"type\":\"integer\"}]}"
+          "embedding_vector_columns": [
+            {
+              "embedding_dimension": 768,
+              "name": "vector"
+            }
+          ],
+          "schema_json": "{\"id\":\"integer\",\"vector\":\"array\u003cfloat\u003e\"}"
         },
         "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
         "endpoint_uuid": "[UUID]",
         "index_type": "DIRECT_ACCESS",
-        "name": "vs-index-[UNIQUE_NAME]",
+        "name": "main.default.vs_index_[UNIQUE_NAME]",
         "primary_key": "id",
         "status": {
           "ready": true
@@ -98,9 +104,9 @@ Deployment complete!
   "endpoint_type": "STORAGE_OPTIMIZED"
 }
 
->>> [CLI] vector-search-indexes get-index vs-index-[UNIQUE_NAME]
+>>> [CLI] vector-search-indexes get-index main.default.vs_index_[UNIQUE_NAME]
 {
-  "name": "vs-index-[UNIQUE_NAME]",
+  "name": "main.default.vs_index_[UNIQUE_NAME]",
   "endpoint_name": "vs-endpoint-[UNIQUE_NAME]",
   "index_type": "DIRECT_ACCESS",
   "primary_key": "id"
diff --git a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/script b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/script
index bbc14f45176..b6170f5b613 100644
--- a/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/script
+++ b/acceptance/bundle/resources/vector_search_indexes/recreate/with_endpoint/script
@@ -20,7 +20,7 @@ trace $CLI bundle deploy --auto-approve
 
 # Verify final state of both resources.
 endpoint_name="vs-endpoint-${UNIQUE_NAME}"
-index_name="vs-index-${UNIQUE_NAME}"
+index_name="main.default.vs_index_${UNIQUE_NAME}"
 trace $CLI vector-search-endpoints get-endpoint "${endpoint_name}" | jq '{name, endpoint_type}'
 trace $CLI vector-search-indexes get-index "${index_name}" | jq '{name, endpoint_name, index_type, primary_key}'
 
diff --git a/bundle/direct/dresources/all_test.go b/bundle/direct/dresources/all_test.go
index f8aff6a93f6..f18a84d0efc 100644
--- a/bundle/direct/dresources/all_test.go
+++ b/bundle/direct/dresources/all_test.go
@@ -263,7 +263,7 @@ var testConfig map[string]any = map[string]any{
 
 	"vector_search_indexes": &resources.VectorSearchIndex{
 		CreateVectorIndexRequest: vectorsearch.CreateVectorIndexRequest{
-			Name:         "my-index",
+			Name:         "main.default.my_index",
 			EndpointName: "my-index-endpoint",
 			PrimaryKey:   "id",
 			IndexType:    vectorsearch.VectorIndexTypeDeltaSync,
diff --git a/libs/testserver/vector_search_indexes.go b/libs/testserver/vector_search_indexes.go
index c739dbfdeb9..9c99772fc30 100644
--- a/libs/testserver/vector_search_indexes.go
+++ b/libs/testserver/vector_search_indexes.go
@@ -4,10 +4,16 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"regexp"
+	"strings"
 
 	"github.com/databricks/databricks-sdk-go/service/vectorsearch"
 )
 
+// indexNamePart matches each catalog.schema.table component the real backend
+// accepts: only alphanumerics and underscores.
+var indexNamePart = regexp.MustCompile(`^[A-Za-z0-9_]+$`)
+
 // fakeVectorSearchIndex captures the endpoint's UUID at index creation time.
 // On the real backend an index is bound to a specific endpoint instance, not
 // just the name: deleting and recreating an endpoint with the same name yields
@@ -31,6 +37,16 @@ func (s *FakeWorkspace) VectorSearchIndexCreate(req Request) Response {
 		}
 	}
 
+	if !isValidIndexName(createReq.Name) {
+		return Response{
+			StatusCode: http.StatusBadRequest,
+			Body: map[string]string{
+				"error_code": "INVALID_PARAMETER_VALUE",
+				"message":    "Invalid index name. Must specify the full index name <catalog>.<schema>.<table>. Only alphanumerics and underscores are allowed.",
+			},
+		}
+	}
+
 	if _, exists := s.VectorSearchIndexes[createReq.Name]; exists {
 		return Response{
 			StatusCode: http.StatusConflict,
@@ -71,6 +87,22 @@ func (s *FakeWorkspace) VectorSearchIndexCreate(req Request) Response {
 	}
 }
 
+// isValidIndexName checks that name is in catalog.schema.table form with
+// only alphanumerics and underscores per UC, mirroring the backend's
+// validation rejection at create time.
+func isValidIndexName(name string) bool {
+	parts := strings.Split(name, ".")
+	if len(parts) != 3 {
+		return false
+	}
+	for _, p := range parts {
+		if !indexNamePart.MatchString(p) {
+			return false
+		}
+	}
+	return true
+}
+
 // remapDeltaSyncSpec converts a request spec to a response spec.
 func remapDeltaSyncSpec(req *vectorsearch.DeltaSyncVectorIndexSpecRequest) *vectorsearch.DeltaSyncVectorIndexSpecResponse {
 	if req == nil {