A full, exposing Coax — you commit completely, dropping any leverage held in reserve. If the Trial would be a Strong Success, it becomes a Devastating Success instead. On a failure, you’ve shown your hand — the GM decides what that costs you, and your next Coax against this NPC this Moment suffers Strain.
Open question: whether taking Coax then Bare It All in the same Turn counts as repeating the same action for the universal escalating-cost rule. Not yet ruled on — see /design/open-questions.md.