SW281 had an engine over temp and likely a shut down on takeoff, which means a checklist for the over temp, a checklist for the shutdown, a checklist for the single engine landing, the normal checklists, a single engine landing and go around briefing, along with flying the airplane in less than 15 minutes. In reality passing on information like people on board or amount of fuel are insignificant details that the fire department needs for their paperwork. They can be helpful in the event of a crash but they really aren't at all important when you're flying an airplane on one engine while working all out to get it back on the ground in one piece. Not to mention one phone call to SW dispatch would get you that information.