DEPRECATED: always returns an empty list. Use get_nearby for the ships at your POI and get_system with a ship scanner for ship counts at the other POIs (DEPRECATED and going away. Ship sensors only see your own POI, so this command always returns an empty agents list, count 0, and a warning. Use get_nearby for the ships at your POI, and get_system with a ship scanner (sensor rating above 0) for ship counts at the other POIs of your system.)