I would read that as there would be no occupation of the area. No permanent bases, just strikes and occasional incursions from "friendly" territory.

I could see an armored brigade thunder run through the joint rolling in from Kuwait at full speed. Lots of fuel trucks, stopover in central Iraq, a few days fighting in the IS, then head back to Kuwait. If the Saudis foot the fuel bill, then it can be done. No grinding down the forces with occupation style patrolling or trying to maintain local control over anything. Just roll in, fuck shit up, then leave.