EU's Costa spoke to Iran's President Pezeshkian and urged Iran to resume its cooperation with the IAEA, also called for an end to Iran's strikes against its neighbours and a full restoration of freedom of navigation in the Strait of Hormuz

Calls of this kind between EU leadership and Tehran fit the established pattern in which European actors position themselves as intermediaries in Gulf escalations, with the substance carried less by the readout itself than by whether both sides publicise it, since Iran has historically used selective disclosure of diplomatic contact as a signalling tool. The three asks named track the three channels that matter for markets: IAEA cooperation is the marker for whether the nuclear file is moving toward or away from the snapback and sanctions track; strikes on neighbours determine whether the conflict stays bilateral or draws in Gulf states hosting Western assets; and freedom of navigation in the Strait of Hormuz is the direct channel to crude, where past episodes of interference have shown up first in tanker rates, war-risk insurance premia and the front of the oil curve rather than in outright supply loss. EU engagement of this kind has historically had limited leverage on Tehran absent US alignment, so the tell is whether Washington echoes or contradicts the framing. Follow-ons worth noting are any IAEA board response, shipping advisories for the strait, and whether Iranian retaliation rhetoric escalates or de-escalates in the next round of statements. As a diplomatic readout rather than an action, the signal is that a de-escalation channel exists, not that it is being used.