what is tool?
American rock band
Tool (band)
Tool is an American rock band from Los Angeles. 
wiki:19650084
Tool (band) [SEP] Introduction
Tool is an American rock band from Los Angeles. Formed in 1990, the group's line-up includes drummer Danny Carey, guitarist Adam Jones, and vocalist Maynard James Keenan. Justin Chancellor has been the band's bassist since 1995, replacing their original bassist Paul D'Amour. Tool has won four Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries. To date, the band has released five studio albums, one EP and one box set. They emerged with a heavy metal sound on their first studio album, "Undertow" (1993), and became a dominant act in the alternative metal movement with the release of their follow-up album "Ænima" in 1996.