"I'm going to do Spell Immunity: Malediction, Spell Immunity: Trap the Soul, Protection from Evil, cloak of Spell Resistance, swap to Splendour headband, invoke your Glibness, and then not say or do anything.  If we don't think that's enough to avoid my giving things away, then I've got a scroll of Dominate Person you could use on me -"

"Actually we should maybe head out of the Rope Trick and over to the whiteboard area to plan this out.  People with access to the demiplane Forbiddance are people with full clearance, or they're supposed to be."

"I'm going to do Greater Spell Immunity: Trap the Soul, Malediction, to be determined.  Protection from Evil, cloak of Spell Resistance, swap to Splendour headband, invoke your Glibness, and then not say or do anything.  If we don't think that's enough to avoid my giving things away, then I've got a scroll of Dominate Person you could use on me -"

"Actually we should maybe head out of the Rope Trick and over to the whiteboard area to plan this out.  People with access to the demiplane Forbiddance are people with full clearance, or they're supposed to be."