Is it possible for an agent within an account to submit a satisfaction rating for a ticket? What if the agent is the requester on a ticket?
No, it is not possible for an agent to submit a satisfaction rating for a ticket, even if they are the requester. This is to limit the potential possibility of agents artificially increasing satisfaction scores within an account, either for themselves or the help desk overall.
If your agents are regularly requesters and you would like to have them rate these tickets, please consider having them submit requests through an end-user account, i.e. a personal email not associated to their agent email.