Companions don't do what they say they do.

It seems to be a complete toss-up whether a tamed beast companion actually does what it says it does.

My Rasp Scavenger with "empowered reviving minions" has never summoned nor revived a minion.

And my Boulder Ant with Haste Aura, Shroud Walker, and Hasted doesn't use Haste Aura, and doesn't seem to do any shroud walking.

Is there something I'm supposed to be doing to get coax these animals into actually using their abilities, or were they just lying to me about what they can do so that I'd take them in and keep them fed and sheltered?