On the other hand, if most of the other houses in the community have pools, and the climate is hot enough to make pools desirable for an extended period of time, renters may expect a rental to come with a pool.
I'm not aware of any legal guidelines to follow--but I'm not a lawyer, so this isn't legal advice. However, the landlord in any case (pool or no pool) should have an umbrella liability policy on top of his/her regular homeowner's policy. They don't cost much--often a few hundred dollars for each $1 million of liability insurance coverage. And there's a concept called "attractive nuisance"--something like a pool, for example. A lawyer can give you the details. But it means that you should take certain steps to make sure that others can't get injured or killed accidentally. That might, for instance, mean that you'd be better protected if you fenced in the pool area.
Hope that helps.