TypedDict as input_schema in 'tool' does not show visible parameters to bot

[Riehantunut]

The docstring of the tool shows that a TypedDict can be inserted as input_schema for declared functions inputted into an MCP server, this is from claude_code_sdk/init.py:

def tool(
    name: str, description: str, input_schema: type | dict[str, Any]
) -> Callable[[Callable[[Any], Awaitable[dict[str, Any]]]], SdkMcpTool[Any]]:
    """Decorator for defining MCP tools with type safety.

    Creates a tool that can be used with SDK MCP servers. The tool runs
    in-process within your Python application, providing better performance
    than external MCP servers.

    Args:
        name: Unique identifier for the tool. This is what Claude will use
            to reference the tool in function calls.
        description: Human-readable description of what the tool does.
            This helps Claude understand when to use the tool.
        input_schema: Schema defining the tool's input parameters.
            Can be either:
            - A dictionary mapping parameter names to types (e.g., {"text": str})
            - A **TypedDict** class for more complex schemas
            - A JSON Schema dictionary for full validation

But then inserting a TypedDict, Claude Code cannot see any params.