Adding Anthropic support and test coverage

Author: Artui

pydantic_ai_slim/pydantic_ai/models/anthropic.py

@@ -874,10 +874,13 @@ def _map_mcp_server_use_block(item: BetaMCPToolUseBlock, provider_name: str) ->
     )
 
 
+mcp_server_result_content_ta: TypeAdapter[Any] = TypeAdapter(Any)
+
+
 def _map_mcp_server_result_block(item: BetaMCPToolResultBlock, provider_name: str) -> BuiltinToolReturnPart:
     return BuiltinToolReturnPart(
         provider_name=provider_name,
         tool_name=CodeExecutionTool.kind,
-        content=item.content,
+        content=mcp_server_result_content_ta.dump_python(item.content, mode='json'),
         tool_call_id=item.tool_use_id,
     )

tests/models/test_anthropic.py

@@ -3078,7 +3078,7 @@ async def test_anthropic_mcp_servers(allow_model_requests: None, anthropic_api_k
                 parts=[
                     ThinkingPart(
                         content='The user is asking what games they have. I have a function available called "test-server_get_my_games" that returns a list of the user\'s favorite games. This seems like the appropriate function to call to answer their question. The function doesn\'t require any parameters according to the schema, so I can call it directly.',
-                        signature=IsStr(),
+                        signature='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',
                         provider_name='anthropic',
                     ),
                     TextPart(content="I'll check what games you have by looking up your game list."),
@@ -3152,7 +3152,7 @@ async def test_anthropic_mcp_servers_stream(allow_model_requests: None, anthropi
                 parts=[
                     ThinkingPart(
                         content="The user is asking about their games. I have a function called `test-server_get_my_games` that returns a list of the user's favorite games. This function doesn't require any parameters, so I can call it directly.",
-                        signature=IsStr(),
+                        signature='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',
                         provider_name='anthropic',
                     ),
                     BuiltinToolCallPart(

tests/models/test_openai_responses.py

@@ -6240,7 +6240,6 @@ async def test_openai_responses_model_mcp_server_tool(allow_model_requests: None
                     BuiltinToolReturnPart(
                         tool_name='mcp_server',
                         content={
-                            'status': 'completed',
                             'name': IsStr(),
                             'server_label': 'test_server',
                             'arguments': '{}',
@@ -6337,7 +6336,6 @@ async def test_openai_responses_model_mcp_server_tool_stream(allow_model_request
                     BuiltinToolReturnPart(
                         tool_name='mcp_server',
                         content={
-                            'status': 'completed',
                             'name': 'get_my_games',
                             'server_label': 'test_server',
                             'arguments': '{}',
@@ -6413,7 +6411,6 @@ async def test_openai_responses_model_mcp_server_tool_stream(allow_model_request
                 part=BuiltinToolReturnPart(
                     tool_name='mcp_server',
                     content={
-                        'status': 'completed',
                         'name': 'get_my_games',
                         'server_label': 'test_server',
                         'arguments': '{}',
@@ -6481,7 +6478,6 @@ async def test_openai_responses_model_mcp_server_tool_stream(allow_model_request
                 result=BuiltinToolReturnPart(
                     tool_name='mcp_server',
                     content={
-                        'status': 'completed',
                         'name': 'get_my_games',
                         'server_label': 'test_server',
                         'arguments': '{}',