A tool was an object or device designed to be used for a specific purpose. Human tools included hammers, screwdrivers, wirecutters, saws and drills. Around 100,000 BC, members of the Tribe of Gum cut up meat with sharp rocks, which they referred to as knives. (TV: An Unearthly Child)
Drax claimed to "never go nowhere without me tools." (TV: The Armageddon Factor)
Some tools, such as the Swiss Army knife, served many purposes. (TV: The Woman Who Fell to Earth)