As we expected, Israel has again agreed to violate the Camp David peace treaty by allowing Egyptian military deployment in Sinai. The violation is being kept informal—that is, the treaty is not being amended—which is actually the worst way of going about this because it establishes a precedent for continual violation.
And it will solve nothing. Reports indicate that Egypt is deploying a mere 1,000 soldiers. The purpose of keeping the force so small is to mollify public opinion, and the real number of troops is probably a few times higher. Nevertheless, it will not be enough. Al Takfir alone has mustered some 200 gunmen for operations, and certainly can bring along many more. Bedouin terrorists are incredibly more numerous.
As usual, the Egyptian government is creating an appearance of fighting terrorism without actually doing so. Terrorist groups will retreat before the army, but they will come back soon after the soldiers return to their barracks.