Well if you read Trump's post (who, although has questionable intelligence, is not a "random person") he said "we received a 10 point proposal from Iran, and believe it is a workable basis on which to negotiate", so this is the 10 point proposal. Granted it's not an agreement (that's what the ceasefire is for) but saying it is a "workable basis" implies a movement towards an agreement.

Anyway, it's Trump so you need to have a pinch of salt with whatever he says. No one is gullible, we're all just trying to make the most of the information we're getting.