Add Backend Tool

Instructions

1. Read backend/main.py to understand existing tool patterns:

   • Find the tools list with function definitions
   • Review helper functions (read_file, write_file, run_terminal_command, web_search)

2. Create the helper function:

   def new_tool_name(param1: str, param2: int = 10) -> str:
       """Docstring explaining the tool."""
       try:
           # Implementation
           return result
       except Exception as e:
           return f"Error: {str(e)}"