Its narrative style in my view. I'd focus on phrases like "rubbish is scattered around what was once a fine guest bedroom" rather than, say, it's a run-down bedroom with rubbish scattered about; there is evidence of rodent infestation ratjher than, say, you can see rats or you can see mouse-droppings everywhere; "its woodwork is worm-ridden" rather than, say, there seem to be termites in the timber; the curtains that once screened the bed are torn and stained rather than, say, the bed has torn, dirty curtains.I use boxed text, like this one from the recent Saltmarsh module:
That, coupled with the fact that I run over virtual tabletop meaning they have an actual map to look at as they explore, gets all the pertinent information into the player's hands and nicely evokes the tone of a scary, haunted house. Would we agree that the boxed text I quoted is narrative style, rather than conversational?
Also, how by mere visual inspection can one tell that it was once a guest bedroom?