The UN Security Council has unanimously adopted a resolution calling for an immediate ceasefire in Lebanon and the withdrawal of Israeli troops. However, it also includes an expansion of the current UN Interim Force in Lebanon (UNIFIL) to 15,000 troops, and authorises it to take
all necessary action... to ensure that its area of operations is not utilized for hostile activities of any kind
This isn't quite an authorisation to use force to prevent hostilities, but it comes close - and there's a strong suggestion that it could be used that way in future. Which means that rather than being a neutral force there to monitor the two sides and provide humanitarian assistance, the UN would effectively be waging war against Hizbollah on Israel's behalf. This is not what the UN is meant to do, and I can think of no surer way of destroying its credibility and marking it as a tool of the hegemon than that.