The discography of American rock band Tool consists of four studio albums, one compilation album, one extended play, four video albums, thirteen singles and eight music videos.
Tool was founded in 1990 by vocalist Maynard James Keenan and guitarist Adam Jones, who then recruited drummer Danny Carey and bassist Paul D’Amour. They initially released a demo EP in 1991. Although demos are typically intended only for record labels, the band was so pleased with theirs that they sold copies to their fans. Tool signed to Zoo Entertainment just three months into their career, and released their first studio EP, Opiate, in March 1992. After touring to positive reviews, they released their first full-length album, Undertow, in April 1993. The album was certified double platinum by the Recording Industry Association of America (RIAA) in 2001.
Shortly after entering the studio to record their second album in September 1995, the band experienced its only lineup change to date, with bassist D’Amour leaving amicably to pursue other projects. He was replaced by Justin Chancellor and recording resumed. October 1996 saw the release of Ænima which eventually beat Tool’s debut in sales, and was certified triple platinum by the RIAA in 2003. The second single from the album, “Ænema”, won the Grammy Award for Best Metal Performance in 1998.