A twenty four hour time limit, if you are the one being awaited on by the party and Dungeon Master, after which point your character falls under the domain of the latter's control. While controlled by the Dungeon Master for your turn, you take the most reasonable action according to the situation and the character's demeanor. As an example in this situation, the dragonborn would resist the grapple and breathe his breath weapon on the guardsmen. Why? It would not be out of character and would not be explicitly working against his person.

Sort of a system of trust and a safety net wherein the Dungeon Master can keep things moving.

As for why I say twenty four hours as a limit is because I am sure there are some like me who do not always have access to Internet and even if they do, they cannot access the Guild.