There are always liabilities with owning, and renting, a property with a pool. Here are some simple tips to help:
1) Protect the pool. Make sure you take an active interest in meeting, and exceeding, all your local city and state requirements for swimming pool barriers.
2) If you have a slide or diving board, remove them. The less you have people actively climbing or jumping, the better liklihood of avoiding injury, risk of injury, and potential lawsuits for lack of maintenance or deteriortated conditions.
3) Make sure you know your renter. If they have young children, you might want to offer some classes to the local swim schools or just rethink renting to parents with young children.
4) Insurance, Insurance, Insurance! Contact your local insurance agent and ask about additional protection that you can carry for renting a house with a pool and gaining lawsuit coverage for accidental injury or death.
I hope this helps!