In Dungeon World, if the GM describes a hazard and a player disregards it should that trigger the Defy Danger move or be considered a Golden Opportunity that triggers a GM move?
For example:
GM: The swamp beast lurches out of the mist, a massive twisted hulk with a tangle of grasping, strangling tentacles reaching out to towards anything within reach. What do you do?
Fighter: I run up and hit it with my sword.
Surely that isn't a simple Hack & Slash. But should it trigger a GM move or a Defy Danger move?
Would it change the answer if the Swamp Beast had the Reach
tag but the Fighter's sword only had the Close
tag?
ETA:
There are a number of things the Fighter could have said that would help clarify this. "I dodge past the tentacles to hit it with my sword" or "I force my way through the tentacles to attack with my sword" or "I hack at the tentacles with my sword" or something like that would help a great deal. But just ignoring the threat the GM described altogether - I'm not sure how to deal with that.
The GM could prompt the Fighter to clarify what they're doing. But the GM !!just described the tentacles!! and was clear about the threat they posed.