tools/simple_tool.py

from smolagents import Tool
from typing import Any, Optional

class SimpleTool(Tool):
    name = "simple_tool"
    description = "A simple tool that returns a string."
    inputs = {"msg":{"type":"string","description":"A string message."}}
    output_type = "string"

    def forward(self, msg: str)->str:
        """
        A simple tool that returns a string.
        Args:
            msg: A string message.
        Returns:
            str: The same string message.
        """
        print(msg)
        return "Hello, world!"