FWIW, someone expanded on this a bit on Fox the other day: these "monitors" are not there to prevent escape, only to "report" the escape. They even speculated that the US "monitors" would not be military personnel, or CIA, but "State Department" personnel, and would most probably be "unarmed."
Thought: just as the UN personnel in the Pali camps are 90% Palestinian, perhaps the State Department has contracted out to the Palis for this assignment...