For a short RP where it isn't the basis of the story, I tend to keep it vague with just enough detail to know what is going on should something happen suddenly in the RP, allowing the minds of the reader (for example, TMH) to go wherever it goes when reading such so they can imagine an idealized situation and the story can progress from there without a lot of trial and error (mostly error).

Fade to black and head-tilt worthy noodle-incidents are for when those details are of minor importance except that "something" happened. A nine month timeskip usually follows shortly afterwards for some reason.

But sometimes it *IS* important to the plot...

I take a similar approach to gore and dismemberment, since if the person's body isn't recognizable, there isn't much point of the narrator deciding whether what the character is looking at is a finger, or a toe.