THe question regarding a 'tool' is rather vague. There are 17 definitions for tool on dictionary.com. It's upto the memb rto decide which one to go with:
tool [tool] Pronunciation Key,
–noun 1. an implement, esp. one held in the hand, as a hammer, saw, or file, for performing or facilitating mechanical operations.
2. any instrument of manual operation.
3. the cutting or machining part of a lathe, planer, drill, or similar machine.
4. the machine itself; a machine tool.
5. anything used as a means of accomplishing a task or purpose: Education is a tool for success.
6. a person manipulated by another for the latter's own ends; cat's-paw.
7. the design or ornament impressed upon the cover of a book.
8. Underworld Slang. a. a pistol or gun.
b. a pickpocket.
9. Slang: Vulgar. penis.
–verb (used with object) 10. to work or shape with a tool.
11. to work decoratively with a hand tool.
12. to ornament (the cover of a book) with a bookbinder's tool.
13. to drive (a vehicle): He tooled the car along the treacherous path.
14. to equip with tools or machinery.
–verb (used without object) 15. to work with a tool.
16. to drive or ride in a vehicle: tooling along the freeway.
—Verb phrase17. tool up, to install machinery designed for performing a particular job: manufacturers tooling up for production.
So all the 'tools' I saw on the first page are correct and meet the requirements of the question.
