How will I know my water pump needs to be replaced?

I've recently replaced my cam belt. The guys at the Renault dealership told me that it is advisable to change the water pump as well because the pump is only reachable when removing the cam belt. I asked them if there is anything wrong with the water pump and they said no it's just precaution.

Now I'm kinda paranoid driving the car as I dont know if the water pump will break any time soon. I also don't hear any strange noises and I don't see any liquids leaking. So now I'm wondering if my car will give me some sort of warning or will the computer shut down to protect itself if the pump is faulty?

Thanks in advance