diff --git a/src/main/java/com/alibaba/dashscope/agentstudio/model/Configs.java b/src/main/java/com/alibaba/dashscope/agentstudio/model/Configs.java
index b20c5d5..d24698d 100644
--- a/src/main/java/com/alibaba/dashscope/agentstudio/model/Configs.java
+++ b/src/main/java/com/alibaba/dashscope/agentstudio/model/Configs.java
@@ -3,6 +3,7 @@
 
 import com.google.gson.annotations.SerializedName;
 import java.util.List;
+import java.util.Map;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -82,6 +83,13 @@ public static class PerToolConfig {
 
       @SerializedName("permission_policy")
       private PermissionPolicy permissionPolicy;
+
+      /**
+       * Per-tool parameters, e.g. {@code knowledge_application_id} for the {@code
+       * search_knowledgebases} knowledge-retrieval tool. Serialized only when set.
+       */
+      @SerializedName("params")
+      private Map<String, Object> params;
     }
   }
 
diff --git a/src/main/java/com/alibaba/dashscope/agentstudio/model/Mount.java b/src/main/java/com/alibaba/dashscope/agentstudio/model/Mount.java
new file mode 100644
index 0000000..e380dbd
--- /dev/null
+++ b/src/main/java/com/alibaba/dashscope/agentstudio/model/Mount.java
@@ -0,0 +1,127 @@
+package com.alibaba.dashscope.agentstudio.model;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+
+/**
+ * Typed session-resource mount descriptor (create-time input on POST /sessions).
+ *
+ * <p>Extends {@link LinkedHashMap} so it fits the existing {@code List<Map<String, Object>>}
+ * resources parameter without conversion:
+ *
+ * <pre>{@code
+ * List<Map<String, Object>> resources = new ArrayList<>();
+ * resources.add(Mount.oss("cn-beijing", "my-bucket", "datasets/", "/data")
+ *     .readOnly());
+ * resources.add(Mount.bailianMemory("lib_xxx", "customer_001")
+ *     .projectIds(Arrays.asList("fact_rule_1"))
+ *     .profileSchema("schema_xxx"));
+ * }</pre>
+ */
+public class Mount extends LinkedHashMap<String, Object> {
+
+  private static final long serialVersionUID = 1L;
+
+  public static Mount file(String fileId, String mountPath) {
+    return new Mount().putType("file").fileId(fileId).mountPath(mountPath);
+  }
+
+  public static Mount memoryStore(String memoryStoreId) {
+    return new Mount().putType("memory_store").memoryStoreId(memoryStoreId);
+  }
+
+  public static Mount bailianMemory(String memoryStoreId, String entityId) {
+    return new Mount()
+        .putType("memory_store")
+        .provider("agentstudio_memory")
+        .memoryStoreId(memoryStoreId)
+        .entityId(entityId);
+  }
+
+  public static Mount oss(String region, String bucket, String ossPath, String mountPath) {
+    return new Mount()
+        .putType("oss")
+        .region(region)
+        .bucket(bucket)
+        .ossPath(ossPath)
+        .mountPath(mountPath);
+  }
+
+  public Mount putType(String type) {
+    put("type", type);
+    return this;
+  }
+
+  public Mount fileId(String fileId) {
+    put("file_id", fileId);
+    return this;
+  }
+
+  public Mount mountPath(String mountPath) {
+    put("mount_path", mountPath);
+    return this;
+  }
+
+  public Mount memoryStoreId(String memoryStoreId) {
+    put("memory_store_id", memoryStoreId);
+    return this;
+  }
+
+  public Mount provider(String provider) {
+    put("provider", provider);
+    return this;
+  }
+
+  public Mount entityId(String entityId) {
+    put("entity_id", entityId);
+    return this;
+  }
+
+  public Mount projectIds(List<String> projectIds) {
+    put("project_ids", projectIds);
+    return this;
+  }
+
+  public Mount profileSchema(String profileSchema) {
+    put("profile_schema", profileSchema);
+    return this;
+  }
+
+  public Mount description(String description) {
+    put("description", description);
+    return this;
+  }
+
+  public Mount access(String access) {
+    put("access", access);
+    return this;
+  }
+
+  public Mount readOnly() {
+    return access("read_only");
+  }
+
+  public Mount readWrite() {
+    return access("read_write");
+  }
+
+  public Mount instructions(String instructions) {
+    put("instructions", instructions);
+    return this;
+  }
+
+  public Mount region(String region) {
+    put("region", region);
+    return this;
+  }
+
+  public Mount bucket(String bucket) {
+    put("bucket", bucket);
+    return this;
+  }
+
+  public Mount ossPath(String ossPath) {
+    put("oss_path", ossPath);
+    return this;
+  }
+}
diff --git a/src/main/java/com/alibaba/dashscope/agentstudio/model/Session.java b/src/main/java/com/alibaba/dashscope/agentstudio/model/Session.java
index a0fc5bf..0a09a34 100644
--- a/src/main/java/com/alibaba/dashscope/agentstudio/model/Session.java
+++ b/src/main/java/com/alibaba/dashscope/agentstudio/model/Session.java
@@ -114,6 +114,15 @@ public static class StopReason {
     private List<String> pendingCallIds;
   }
 
+  /**
+   * A resource mounted into a session. Fields depend on {@code type}: {@code file} carries {@code
+   * fileId}/{@code mountPath}; {@code memory_store} carries {@code memoryStoreId}/{@code
+   * access}/{@code instructions}/{@code name}/{@code description} and — when {@code provider} is
+   * {@code agentstudio_memory} — {@code entityId}/{@code projectIds}/{@code profileSchema} (Bailian
+   * memory mounts carry no mount path); {@code oss} carries {@code region}/{@code bucket}/{@code
+   * ossPath}/{@code mountPath}/{@code access}. {@code provider} values are not validated so
+   * historical responses stay readable. Memory and OSS mounts are create-only.
+   */
   @Data
   @EqualsAndHashCode(callSuper = true)
   public static class SessionResource extends FlattenResultBase {
@@ -126,9 +135,45 @@ public static class SessionResource extends FlattenResultBase {
     @SerializedName("file_id")
     private String fileId;
 
+    @SerializedName("memory_store_id")
+    private String memoryStoreId;
+
+    @SerializedName("provider")
+    private String provider;
+
+    @SerializedName("entity_id")
+    private String entityId;
+
+    @SerializedName("project_ids")
+    private List<String> projectIds;
+
+    @SerializedName("profile_schema")
+    private String profileSchema;
+
+    @SerializedName("access")
+    private String access;
+
+    @SerializedName("instructions")
+    private String instructions;
+
+    @SerializedName("name")
+    private String name;
+
+    @SerializedName("description")
+    private String description;
+
     @SerializedName("mount_path")
     private String mountPath;
 
+    @SerializedName("region")
+    private String region;
+
+    @SerializedName("bucket")
+    private String bucket;
+
+    @SerializedName("oss_path")
+    private String ossPath;
+
     @SerializedName("created_at")
     private String createdAt;
 
diff --git a/src/test/java/com/alibaba/dashscope/TestAgentStudioProtocol.java b/src/test/java/com/alibaba/dashscope/TestAgentStudioProtocol.java
index 2f9f60e..9b98ab8 100644
--- a/src/test/java/com/alibaba/dashscope/TestAgentStudioProtocol.java
+++ b/src/test/java/com/alibaba/dashscope/TestAgentStudioProtocol.java
@@ -11,6 +11,7 @@
 import com.alibaba.dashscope.agentstudio.message.ContentBlock;
 import com.alibaba.dashscope.agentstudio.message.Message;
 import com.alibaba.dashscope.agentstudio.model.Configs;
+import com.alibaba.dashscope.agentstudio.model.Mount;
 import com.alibaba.dashscope.agentstudio.model.Session;
 import com.alibaba.dashscope.agentstudio.param.AgentCreateParam;
 import com.alibaba.dashscope.agentstudio.param.SessionEventListParam;
@@ -20,6 +21,7 @@
 import com.google.gson.JsonObject;
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.HashSet;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.mockwebserver.MockResponse;
@@ -212,4 +214,111 @@ void testPermissionPolicySerializedInToolConfig() {
     assertEquals(
         "always_ask", dcJson.getAsJsonObject("permission_policy").get("type").getAsString());
   }
+
+  @Test
+  void testMountUsesWireKeys() {
+    Mount bailian =
+        Mount.bailianMemory("0123", "customer_001")
+            .projectIds(Arrays.asList("fact_rule_1"))
+            .profileSchema("schema_demo")
+            .description("ctx")
+            .readOnly();
+    assertEquals(
+        new HashSet<>(
+            Arrays.asList(
+                "type",
+                "provider",
+                "memory_store_id",
+                "entity_id",
+                "project_ids",
+                "profile_schema",
+                "description",
+                "access")),
+        bailian.keySet());
+    assertEquals("agentstudio_memory", bailian.get("provider"));
+    assertEquals("read_only", bailian.get("access"));
+
+    Mount oss = Mount.oss("cn-beijing", "bkt", "datasets/", "/data").readOnly();
+    assertEquals(
+        new HashSet<>(
+            Arrays.asList("type", "region", "bucket", "oss_path", "mount_path", "access")),
+        oss.keySet());
+  }
+
+  @Test
+  void testToolConfigParamsSerialized() {
+    Configs.ToolConfig.PerToolConfig perTool = new Configs.ToolConfig.PerToolConfig();
+    perTool.setName("search_knowledgebases");
+    perTool.setEnabled(true);
+    java.util.HashMap<String, Object> params = new java.util.HashMap<>();
+    params.put("knowledge_application_id", "aid_demo");
+    perTool.setParams(params);
+
+    Configs.ToolConfig tool = new Configs.ToolConfig();
+    tool.setType("builtin_toolkit");
+    tool.setConfigs(Arrays.asList(perTool));
+
+    JsonObject body =
+        AgentCreateParam.builder()
+            .name("rag")
+            .model("qwen-max")
+            .tools(Arrays.asList(tool))
+            .build()
+            .getHttpBody();
+    JsonObject perToolJson =
+        body.getAsJsonArray("tools")
+            .get(0)
+            .getAsJsonObject()
+            .getAsJsonArray("configs")
+            .get(0)
+            .getAsJsonObject();
+    assertEquals(
+        "aid_demo",
+        perToolJson.getAsJsonObject("params").get("knowledge_application_id").getAsString());
+
+    // Read back: Agent.tools keeps params, so read-modify-write resubmits them.
+    Configs.ToolConfig parsed =
+        GSON.fromJson(body.getAsJsonArray("tools").get(0), Configs.ToolConfig.class);
+    assertEquals(
+        "aid_demo", parsed.getConfigs().get(0).getParams().get("knowledge_application_id"));
+  }
+
+  @Test
+  void testSessionResourceParsesMountFields() {
+    Session.SessionResource memory =
+        GSON.fromJson(
+            "{\"id\":\"mount_1\",\"type\":\"memory_store\",\"memory_store_id\":\"0123\","
+                + "\"provider\":\"agentstudio_memory\",\"entity_id\":\"customer_001\","
+                + "\"project_ids\":[\"fact_rule_1\"],\"profile_schema\":\"schema_demo\","
+                + "\"description\":\"ctx\",\"access\":\"read_only\"}",
+            Session.SessionResource.class);
+    assertEquals("agentstudio_memory", memory.getProvider());
+    assertEquals("customer_001", memory.getEntityId());
+    assertEquals(Arrays.asList("fact_rule_1"), memory.getProjectIds());
+    assertEquals("schema_demo", memory.getProfileSchema());
+    assertEquals("read_only", memory.getAccess());
+    assertNull(memory.getMountPath());
+
+    Session.SessionResource oss =
+        GSON.fromJson(
+            "{\"id\":\"sesrsc_1\",\"type\":\"oss\",\"region\":\"cn-beijing\","
+                + "\"bucket\":\"agentstudio-ma-oss-mnt\",\"oss_path\":\"datasets/\","
+                + "\"mount_path\":\"/data\",\"access\":\"read_only\"}",
+            Session.SessionResource.class);
+    assertEquals("cn-beijing", oss.getRegion());
+    assertEquals("agentstudio-ma-oss-mnt", oss.getBucket());
+    assertEquals("datasets/", oss.getOssPath());
+    assertEquals("/data", oss.getMountPath());
+
+    // Historical built-in mounts predate provider; those fields stay null.
+    Session.SessionResource legacy =
+        GSON.fromJson(
+            "{\"id\":\"mount_2\",\"type\":\"memory_store\",\"memory_store_id\":\"memstore_1\","
+                + "\"mount_path\":\"/uploads/memory\"}",
+            Session.SessionResource.class);
+    assertNull(legacy.getProvider());
+    assertNull(legacy.getEntityId());
+    assertEquals("memstore_1", legacy.getMemoryStoreId());
+    assertEquals("/uploads/memory", legacy.getMountPath());
+  }
 }