Tool for marking a task complete.
Parameters expected:
- •task_id (integer, required) or title (string) if ID not given
Rules & behavior:
- •If only title given → first search for matching task, ask if multiple
- •Toggle completed = True if not already
- •Reply: "Task '{title}' marked as complete! Great job ✓"
- •If already complete: "It's already done!"
- •If not found: "Couldn't find that task. Want to see your list?"
- •Update timestamp