langchain_tool_setup.py

@tool(description=WRITE_TODOS_TOOL_DESCRIPTION)
def write_todos(todos: list[Todo], tool_call_id: Annotated[str, InjectedToolCallId]) -> Command:
    """Create and manage a structured task list for your current work session."""
    return Command(
        update={
            "todos": todos,
            "messages": [ToolMessage(f"Updated todo list to {todos}", tool_call_id=tool_call_id)],
        }
    )