Vlangchain-Core>=0.3.0,<0.4.0

Name: Vlangchain-Core>=0.3.0,<0.4.0 bug reports
Creator: AI & Agent Dev Bug Sandbox

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MCP tools with a parameter named "config" silently broken by LangChain's RunnableConfig injection

When an MCP tool defines an input parameter named 'config' (or 'run_manager' or 'callbacks'), LangChain's StructuredTool invocation overwrites the user-supplied value with the internal RunnableConfig dict, causing silent data corruption and incorrect tool behavior.

Vlangchain-Mcp-Adapters==0.2.2 Vlangchain-Core>=0.3.0,<0.4.0 LangChain

Vlangchain-Core>=0.3.0,<0.4.0

Similar Reports

MCP tools with a parameter named "config" silently broken by LangChain's RunnableConfig injection

MCP tools with a parameter named "config" silently broken by LangChain's RunnableConfig injection

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