Contrary to what many people (usually tools) think, being a tool has nothing to do with being easily manipulated. Those people are simply "suckers". In fact, tools often take life too seriously, and therefore try too hard to manipulate others and to win everything, but always playing by the rules of society. Intellectual pursuits are not of any interest to a tool, and people who are interested in them are "stuck-up" or "faggy". A tool just likes to have a few beers, watch and talk about sports constantly, and refer to women as "sluts" and themselves "players". Tools are usually borderline retarded, but hide it well because they have the uncanny ability to conform almost perfectly to social norms.
If a movie, or song becomes popular in society, the tool will quickly adapt said movie or song as one of their favorites (see Lil' Jon, Souljah Boy, Boondock Saints). Their "social commentary" is often crudely taken from the last episode of South Park.
A tool can usually be spotted wearing a backwards baseball cap and athletic attire, playing beer pong at any large, obnoxious party where loud mainstream rap music is played.
"Whoaaaaaaaaa, party foul bro! What a fag!"
"Wow, that guy is such a tool."