That'll do for checks. Capizzio searches around and is quite certain that there is no way out of the chambers that you are in now. Hmmm, how did you get in here, again?
Kerlan doesn't need to cast Detect Magic because of the similarity of this set-up to the previous teleportation portal that brought you here. Kerlan surmises that this is a portal similar to that one, and that all within the circle will be teleported somewhere when the rune-image of the door is touched. The question in Kerlan's mind is 'teleported to where?'