diff --git a/google/genai/_interactions/types/content_delta.py b/google/genai/_interactions/types/content_delta.py
index 8b7a0ee0b..2f6fd3c86 100644
--- a/google/genai/_interactions/types/content_delta.py
+++ b/google/genai/_interactions/types/content_delta.py
@@ -162,7 +162,7 @@ class DeltaFunctionResultDeltaResultItems(BaseModel):
     items: Optional[List[DeltaFunctionResultDeltaResultItemsItem]] = None
 
 
-DeltaFunctionResultDeltaResult: TypeAlias = Union[DeltaFunctionResultDeltaResultItems, str, object]
+DeltaFunctionResultDeltaResult: TypeAlias = Union[DeltaFunctionResultDeltaResultItems, str]
 
 
 class DeltaFunctionResultDelta(BaseModel):
@@ -268,7 +268,7 @@ class DeltaMCPServerToolResultDeltaResultItems(BaseModel):
     items: Optional[List[DeltaMCPServerToolResultDeltaResultItemsItem]] = None
 
 
-DeltaMCPServerToolResultDeltaResult: TypeAlias = Union[DeltaMCPServerToolResultDeltaResultItems, str, object]
+DeltaMCPServerToolResultDeltaResult: TypeAlias = Union[DeltaMCPServerToolResultDeltaResultItems, str]
 
 
 class DeltaMCPServerToolResultDelta(BaseModel):
diff --git a/google/genai/_interactions/types/function_result_content.py b/google/genai/_interactions/types/function_result_content.py
index fa9c29015..63f2a834a 100644
--- a/google/genai/_interactions/types/function_result_content.py
+++ b/google/genai/_interactions/types/function_result_content.py
@@ -31,7 +31,7 @@ class ResultItems(BaseModel):
     items: Optional[List[ResultItemsItem]] = None
 
 
-Result: TypeAlias = Union[ResultItems, str, object]
+Result: TypeAlias = Union[ResultItems, str]
 
 
 class FunctionResultContent(BaseModel):
diff --git a/google/genai/_interactions/types/function_result_content_param.py b/google/genai/_interactions/types/function_result_content_param.py
index dca34d07d..293be60cf 100644
--- a/google/genai/_interactions/types/function_result_content_param.py
+++ b/google/genai/_interactions/types/function_result_content_param.py
@@ -32,7 +32,7 @@ class ResultItems(TypedDict, total=False):
     items: Iterable[ResultItemsItem]
 
 
-Result: TypeAlias = Union[ResultItems, str, object]
+Result: TypeAlias = Union[ResultItems, str]
 
 
 class FunctionResultContentParam(TypedDict, total=False):
diff --git a/google/genai/_interactions/types/mcp_server_tool_result_content.py b/google/genai/_interactions/types/mcp_server_tool_result_content.py
index dafa0bd8a..d14b8068a 100644
--- a/google/genai/_interactions/types/mcp_server_tool_result_content.py
+++ b/google/genai/_interactions/types/mcp_server_tool_result_content.py
@@ -31,7 +31,7 @@ class ResultItems(BaseModel):
     items: Optional[List[ResultItemsItem]] = None
 
 
-Result: TypeAlias = Union[ResultItems, str, object]
+Result: TypeAlias = Union[ResultItems, str]
 
 
 class MCPServerToolResultContent(BaseModel):
diff --git a/google/genai/_interactions/types/mcp_server_tool_result_content_param.py b/google/genai/_interactions/types/mcp_server_tool_result_content_param.py
index 1f0c087d9..2f55a85ae 100644
--- a/google/genai/_interactions/types/mcp_server_tool_result_content_param.py
+++ b/google/genai/_interactions/types/mcp_server_tool_result_content_param.py
@@ -32,7 +32,7 @@ class ResultItems(TypedDict, total=False):
     items: Iterable[ResultItemsItem]
 
 
-Result: TypeAlias = Union[ResultItems, str, object]
+Result: TypeAlias = Union[ResultItems, str]
 
 
 class MCPServerToolResultContentParam(TypedDict, total=False):