I've been in this situation.
I think the key is at the start of the process, always show the director the report prior to sending it out - so they get a sense of what you are putting into the reports.
You can, as other have mentioned, today we worked with three chairs for scene three. Or POSSIBLE ADD: Two Small potted plants - where you are giving them a heads up that it might be added down the road.
My director who had this issue was he would sometimes lie to an actor to get through a difficult scene (Like, oh, sure we can add two chairs to this scene), but it was always his intention to have zero chairs in the scene.
But I always put everything into the report, with the caveat things can change - and they do.