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Require tool calls with ID in langchain ext #199

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Merged
gvdongen merged 1 commit into from
May 22, 2026
Merged

Require tool calls with ID in langchain ext #199

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5 changes: 2 additions & 3 deletions python/restate/ext/langchain/_middleware.py
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Original file line number Diff line number Diff line change
Expand Up @@ -114,10 +114,9 @@ async def awrap_tool_call(
request: ToolCallRequest,
handler: Callable[[ToolCallRequest], Awaitable[ToolCallResult]],
) -> ToolCallResult:
tool_call = request.tool_call
tool_call_id: Optional[str] = tool_call.get("id") if isinstance(tool_call, dict) else None
tool_call_id = request.tool_call.get("id")
if tool_call_id is None:
return await handler(request)
return ToolMessage("Function call ID is required for tool invocation. Please set `id` on the ToolCall.")

ctx = current_context()
assert ctx is not None, "RestateMiddleware must run inside a Restate handler"
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