my_tool_reverse_string.py

from smolagents import Tool


#AUTHORIZED_TYPES = [
#    "string",
#    "boolean",
#    "integer",
#    "number",
#    "image",
#    "audio",
#    "array",
#    "object",
#    "any",
#    "null",
#]


class ReverseStringTool(Tool):
    name = "_my_tool_reverse_string"
    description = """
        Decode a string which is provided in a reversed form
        To invoke the tool use code as below
        <code>
        reversed_string = _my_tool_reverse_string(input_str="dummy")
        </code>
    """

    inputs = {
        "input_str": {
            "type": "string",
            "description": "encoded input string",
        }
    }

    output_type = "string"

    def forward(self, input_str: str) -> str:
        _out = ""
        for a in input_str:
            _out = a + _out
        return _out