You hold your Thrust Knife between your teeth, keeping it handy while your hands are busy picking the lock on a noble’s unguarded luggage. Leaving anything valuable without a guard is like an invitation to steal it...at least that’s been your experience.
With a satisfying ‘click!’ the lock comes undone and you pry the chest open to reveal--oh, yes! That will do nicely. You pocket what looks to be a sizeable purse and a few interesting looking weapons, before carefully replacing the lock and sneaking out of the tent undetected.