BetaAsyncFunctionTool Class — anthropic-sdk-python Architecture

Source Code

src/anthropic/lib/tools/_beta_functions.py lines 191–202

class BetaAsyncFunctionTool(BaseFunctionTool[AsyncFunctionT]):
    async def call(self, input: object) -> BetaFunctionToolResultType:
        if not iscoroutinefunction(self.func):
            raise RuntimeError("Cannot call a synchronous function asynchronously. Use `@tool` instead.")

        if not is_dict(input):
            raise TypeError(f"Input must be a dictionary, got {type(input).__name__}")

        try:
            return await self._func_with_validate(**cast(Any, input))
        except pydantic.ValidationError as e:
            raise ValueError(f"Invalid arguments for function {self.name}") from e