There should be an open communication standard that all robots use to communicate with each other.

And it will only be used for good and nothing nefarious.

Aside from the obvious I, Robot movie allusion, this idea doesn’t really work in the real world because robots have to be able to detect the presence and anticipate the actions of non-robots anyway. Unless you’re willing to ban all the actual people from the street, which is unreasonable, robot-to-robot communication doesn’t actually help you.