Iran’s compromise with the International Atomic Energy Agency (IAEA) buys Tehran three more months to broach negotiations with the United States in the hopes of securing sanctions relief. During IAEA Director-General Rafael Grossi’s recent visit to Iran, the Atomic Energy Organization of Iran (AEOI) said it would stop the voluntary implementation of its so-called “Additional Protocol” on Feb. 23, a confidential agreement that allows U.N. inspectors to monitor Tehran’s nuclear program and visit its facilities, particularly with short notice. But the two sides also reached a compromise on verification and monitoring that will maintain limited IAEA access to nuclear sites....