Keane was in no mood to entertain the journalist's suggestion that McCarthy has fallen out of favour under Ronald Koeman at Goodison.
Asked about McCarthy losing his place, Keane replied: "I don't know if that's true or not did he not start at West Brom?
"Did he start against West Brom two weeks ago and was injured against Stoke?
"If that's a player out of his manager's plans then what about all the other players who started against West Brom. Everyone gets linked with stuff so do your homework.
"Obviously they've kept him on and not sold him have they so maybe the manager does like him.