I was looking for a place in a big Canadian city and came upon one listing that had very, very detailed rules and lots of them. I probably shouldn't complain here as it's not nice to knock other hosts, but there were two bedrooms in this condo and she was obviously renting each out separately, so as a single woman going in, I could have ended up in a bad situation, because who knows who else is going to show up? She said that if there was a problem getting along with the other guest, to email her, like that was a real solution.
The rules were so long and so onerous, I just gave up reading and thought, 'Christ, why don't you just rent it out whole and stop trying to micromanage from overseas' (she says she's not living in Canada at the moment).
All this to say, keep the rules to a minimum, but since it's clear you are in the place itself, maybe take photographs of things like the shelf space and say in the caption that "this is what you'll be getting." As in, lay out the physical space, mention the limits of sharing and hopefully, only those who get it will book with you. Other than that, you should really read potential guests' reviews closely, just to save yourself the wear and tear on your nerves.