Here is the mechanical framework for that last possibility:
When you read a person in a charged interaction, roll+sharp. On a 10+, hold 3. On a 7–9, hold 1. While you’re interacting
with them, spend your hold to ask their player questions, 1 for 1:
• is your character telling the truth?
• what’s your character really feeling?
• what does your character intend to do?
• what does your character wish I’d do?
• how could I get your character to __?
Reading a person is an investment in time. It means studying them carefully through the whole conversation, noticing changes in their tone, the movements of their eyes and hands, their most fleeting expressions. In play, have the player roll this move only (a) when the interaction is genuinely charged, and (b) when you’re going to play the interaction through.
So the GM has put the player in a spot - a guard is talking to them - but has also provided the player with an opportunity - to talk to the guard and learn, for instance, "How could I get your character to let me into the warehouse unannounced?"