In the aircraft I fly, the Cargo Fire Boeing QRH checklist does not stipulate an Evacuation. It only stipulates, do not open the Cargo door until passengers are off the aircraft.
However, the Evacuation checklist condition statement indicates if an Evacuation is required, follow this checklist.
In my opinion, Boeing puts the decision & responsibility of Evacuating the aircraft with the Captain.
Hence, my statements earlier. The Captain shall make the decision to Evacuate based on all available information.
MC