The power/characteristic is something basic, very useful, it would be used to know if the message was read by the person to whom we sent it in private and ensure that communication continues.
Design a brief example:
This suggestion I do because sometimes we are left with the intrigue if the person received the message or read it, since sometimes we are in another chat and we send messages and we do not know if it reaches its destination. If they like the idea, could give another suggestion for this new power!