Thanks Sarah, so sorry you had to deal with this horrible tenant. Did you take her to court?
Regarding the contract, a simple line at the end that stipulates any item not addressed in the contract would have to be run by you should suffice in terms of keeping it short (as well as specifying penalties if they don’t ask - with the language of the penalty to be defined by you).
On a separate note, half a month rent as a security deposit seems very low! The government doesn’t seem to want to spur real estate wealth increase (surprising). I would reconsider renting the property and/or selling the property and use the money to pursue other investment opportunities if those were the conditions I faced. But that’s my opinion - to each his/her own.
Thanks, and best of luck!