The recent history of UNSC-imposed sanctions to end nuclear weapons programs is, well, um….just read.

UNSCR 1441: Iraq mostly complied and was increasing its compliance when the US-led invasion happened in early-2003. And Iraq had no WMD.

UNSCR 1172: It’s pretty hard to say that either India or Pakistan has complied. Pakistan is a major non-NATO ally and the United States has obviously been improving its relations with India (as have a lot of other governments).

Yes, that’s condensing some complex history, but I think you get the point about compliance/response.