Just humour the IAEA once more, and get our blighted sanctions lifted off you, is the gist of a message the US got across to Iran.
But if Iran wasnt the wiser before, it is now. Allowing more word play is as far as might go with humouring other parties to the JCPOA or the IAEA.
Iran has obliged beyond its obligations since the 2015 signing of the JCPOA, and the IAEA bore witness to this 15 times no less. New allegations it is waving around now all of a sudden, just before another signing, can only be because that neutral technical agency has become politicized.