An international force in Gaza and the West Bank would be there to enfoce the UN resolutions that apply to Gaza and the West Bank. Seems like an excellent idea to me. Palestinians have asked for international force more than once, but it has always been resisted by Israel. I assume that is because Israel does not want those UN resolutions enforced -- does not want to move behind the 1967 green line (settlers and all).
Preliminary report: Palestinian stabs man near Damascus Gate, Jerusalem (Haaretz)
from the article: Between Jabalya and Bint Jbail