You have to say something to the 911 operator so the cops know you are the homeowner and not an armed criminal. The word intruder is important. It’s not a bad idea to give the operator a description of yourself as well, just to be sure they don’t shoot you, especially if you are holding a suspect at gunpoint. I don’t think there’s anything in that one line that can harm you in court. Beyond that, shut up.
I don’t have to say anything to the 911 operator, since they’ll never get a call from our household.