/ability

Command	Effect
/ability (= /mxt ability)	Opens the ability hotbar configuration screen.
/ability cast <id> (= /mxt ability cast <id>)	Forces an ability to be cast.
/ability list [<target>] (= /mxt ability list …)	Lists what a holder carries: the ability's name and the sources still keeping it granted. It reads the attachment rather than the registry, so an ability whose definition was disabled or deleted is still listed — it is still held, and revoking it by name is still what takes it off. Without a target it looks at you, and it needs no permission.
/ability grant <targets> <ability> (= /mxt ability grant …)	Grants the ability under the command's own source mxt:command (needs the gamemaster permission). Each target is reported separately, and a target already holding it from that source is a failure.
/ability revoke <targets> <ability> (= /mxt ability revoke …)	Drops only the mxt:command source (needs the gamemaster permission); nothing happens while another source still holds it, and that target is reported as a failure.