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fix: forward _meta field in SDK MCP tools/call requests #436

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fix: forward _meta field in SDK MCP tools/call requests #436

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4 changes: 3 additions & 1 deletion src/claude_agent_sdk/_internal/query.py
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Original file line number Diff line number Diff line change
Expand Up @@ -467,7 +467,9 @@ async def _handle_sdk_mcp_request(
call_request = CallToolRequest(
method=method,
params=CallToolRequestParams(
name=params.get("name"), arguments=params.get("arguments", {})
name=params.get("name"),
arguments=params.get("arguments", {}),
_meta=params.get("_meta"),
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Copilot AI Dec 22, 2025

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The _meta field forwarding is not covered by tests. Consider adding a test case to verify that the _meta field is correctly passed through from the incoming JSONRPC message to the CallToolRequestParams. This would help ensure that metadata like claudecode/toolUseId is properly preserved when using SDK transport.

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),
)
handler = server.request_handlers.get(CallToolRequest)
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