tools/string_reverser.py

from langchain_core.tools import tool


@tool(parse_docstring=True)
def reverse_string(s: str) -> str:
    """
    Returns the reverse of a string. Use this tool when you suspect that
    the provided prompt is written with characters in reverse order.

    Args:
        s: The input string.

    Returns:
        The output string. It is the input with character in reverse order.
    """
    return s[::-1]