Premise: Maynard James Keenan ( born James Herbert Keenan ; April 17 , 1964 ) , often referred to by his initials MJK , is an American musician , record producer , winemaker , and actor , best known as the vocalist for Grammy Award-winning progressive metal band Tool . Keenan is also the lead singer of A Perfect Circle .
Hypothesis: Maynard James Keenan is a guitarist.
Label: NEUTRAL