Answer questions, clarify

The players will interrupt you and ask questions. Be honest and generous with truth and detail. If the answer wouldn't be clear to the PCs, say so and tell them what it'd take to figure that out. Your job is to portray a rich and mysterious world, not to make them jump through hoops and figure out what you're thinking.

Sometimes, the players will say something that indicates a misunderstanding of the situation. "I slice the back of his leg," the Fox says, when you pictured the violence happening on the other side of the public room with the PCs watching. When that sort of thing happens, clarify the situation with the players. Explain how you see things, but also be willing to adjust your sense of the situation to match theirs. "Huh? No, this is happening on the other side of the pub. I don't think you'd have let it get to this point if you were right there, do you?"