Receiver AGC objective is to have a constant amplitude signal in order to optimize the receiver performance, so it should respond according to the amplitude of the signal of interest and not to the amplitude of another signal (interferer) next to the signal of interest ( next in frequency domain), or RSSI (in the presence of a strong interferer for example).
Is there any application or any case where the AGC operates according to RSSI in the presence of a strong interferer, i.e. it responds practically to the power of the interferer and not to the power of the signal of interest? Would that make any sense at all?