Yoler and Zorch’s intent is to gain entry and circumvent certain guards, but how and where that passage manifests is at the GM’s prerogative. Whether the task is sufficient to gain the intent is also at the GM’s prerogative. He can say that it’s fine. He can say that it will require that and a bit more. He can say that the task is insufficient to the intent.
that kind of thing happens in our games now and then, at the GM’s whim. It isn’t a dice thing. If successful, the player gets their intent. They don’t gain narration rights from the roll.