The MU casts hold person, I shove the necklace in my backpack, and we all skedaddle down the stairs!
Where are these events taking place? The people at table are not doing these things. They are sitting at a table, talking to one another and writing things down.
Nor are these figurative descriptions of moves of pieces on a board. They're not analogous to (say, and picking up on your example) a Forbidden Desert player saying I drink some water and then shovel some sand while lowering their water meter one slot, and removing a sand token from the board.
The action declarations, in Arneson's D&D as much as in a game of Apocalypse World taking place right now, have the purpose of changing what everyone is imagining together, about this group of people exploring a dungeon together. That's the core of the game play!