Villager funktion

From what I know, the bell in village does'nt have too many uses. Why not make it so a villager can ding the bell one or two times if it know it's in danger before it runs home to safety, alerting the other villagers to do the same. Then the iron golem should get notified and run straight to the bell and see whats happening, relize there is danger and then proceed to run around frantically looking for the danger for an amount of time that makes sence, then stop after said time if they dont find the danger, or stop looking after they have killed the danger.