Question about the authority of players to dictate things about the Mission through clever writing of a mouse’s Goal.
GM thinks up a Mission. Say, “Y’all need to find a big ol’ sack of grain, and then somehow transport it to Lockhaven cross-country.”
Player writes a goal: “Capture the Weasels who stole this grain.” Prior to the player’s assumption/soliciting that the weasels are responsible, the GM had no weasel connection in mind. Question is, can the player throw the weasels into the scenario like that?
Certain kinds of role-playing games permit this sort of thing. Clinton Nixon’s Donjon has a mechanic where a player can say, “My dude searches for secret doors,” and if he’s successful there must be a secret door even if the Donjon Master didn’t about it prior to the roll. Ron Edwards’ Trollbabe has something similar.
As I understand it, players do not explicitly have this level of authority in Mouse Guard. On the other hand, the GM is supposed to be responsive to the players’ Beliefs, Instincts, Traits and Goals; these are “flags” or whatever the terms are for the player to indicate where he or she would like to take the mission.
One way to look at this is that even if the player cannot force the weasels into being responsible, a well-mannered GM should at the very least take it into consideration and likely throw it in there.
Or… not? If a player creates a “delusional” goal, is he just asking for suckage?