BetaFunctionTool Class — anthropic-sdk-python Architecture

Source Code

src/anthropic/lib/tools/_beta_functions.py lines 177–188

class BetaFunctionTool(BaseFunctionTool[FunctionT]):
    def call(self, input: object) -> BetaFunctionToolResultType:
        if iscoroutinefunction(self.func):
            raise RuntimeError("Cannot call a coroutine function synchronously. Use `@async_tool` instead.")

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

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