I don't know why you're at this category if you don't know who Tool is... but I'll just assume you're extremely curious. Tool is a heavy metal band. They are sort of progressive-rockish in that their music is very different from most other people today and they have lots of samples and the like in their music. If you like hard rock and you like Pink Floyd you'll probably like Tool.
If you feel your site would add any value to the Open Directory Project at all feel free to submit it, but please check to see if there are sites already listed that contain the same information as your site.
Fan pages for the band Tool. Record company sites, official sites, and deeplinks to sites such as MTV or Rolling Stone belong in the main Tool category.