No. I mean that I understand "action declaration" to be a separate thing from the move. Like the player can declare all sort of things. like "I go to Krumptown to meet Sludge." But if the prep says Krumptown has been burned down and Sludge has been killed, then, that action declaration cannot come to pass, no?
In AW there is no player-side move
when you go to a place to meet a person. So if that's what the player says, the GM makes a move - typically a soft one, unless the player is handing the GM an opportunity on a plate.
In making their move, the GM will
always say what prep demands.
In this case, it's not clear how Krumptown and Sludge are elements of play; or what you have in mind as bringing it about that (i) the player knows about Krumptown but (ii) doesn't know that it has bee burned down, and (iii) knows about Sludge but (iv) doesn't know that Sludge is dead. So I can't really say more than the above with any clarity.
I
can add more stipulations around the episode of play, but I have no idea if that's what you have in mind.
For instance, suppose the PC in question has a gang. And it was established in the first session that the PC's second-in-command used to work for Sludge in Krumptown, but fled Sludge's service and ended up hanging with the PC.
And then, let's suppose that the GM has written up a threat, a Warlord (
impulse: to hunt and dominate; moves include
Claim territory: move into it, blockade it, assault it). And the GM has prepared a countdown clock for this threat, that includes
Burn Krumptown to the ground and
Kill Sludge.
So now, the PC is having their PC go to Krumptown to visit Sludge. The GM looks to their prep. But
When you get there, Krumptown is burned to the ground looks like a pretty hard move to me! So what has happened to license that move? If the answer is
nothing, then the GM can't make it. So maybe when the PC makes their action declaration, the GM responds - "You crest the ridge above Krumptown, and you can see that it's on fire. You can see <Warlord's> gang members running about, cutting people down with their machetes. Sludge's place is in the middle of town, so you can't see what's happening there. What do you do?"
Let's suppose, though that when the PC says "I go to Krumptwon to visit Sludge" this does trigger a move, because it's the PC acting under fire - let's say they're running away from a losing situation, and want Sludge to help them. And so they make their roll for Acting Under Fire. And let's suppose that ends up below 7, so the GM is licensed to make as hard and direct a move as they like. Then maybe the GM says, "When you get to Krumptown, it's burned to the ground. And Sludge's head is sitting on a stick planted in the middle of what used to be the town. You see a flash of reflected sunlight, maybe off glasses or off a gun barrel, from the ridge on the other side of town. What do you do?"