Context This error only occurs when running the graph via langgraph dev command. The same code works correctly with FastAPI hosting. Problem LangGraph CLI incorrectly attempts to validate InjectedState parameters in tool schemas. When using a typed state class (e.g., AgentState), the validation layer treats injected state parameters as required tool arguments and fails. Workaround Use generic dict type instead of custom state class: ❌ Before: state: Annotated[AgentState, Inject...
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