Paste the rendered body copy rather than CMS markup, and keep the headings, because page type is read from structure as much as from wording. The two dates matter more than they look: without a last-substantive-update date the model has nothing to anchor a STALE reading to, and it will reach for one anyway. For performance_history, export at least two non-adjacent windows about a year apart plus a recent query breakdown. A single 28-day export cannot distinguish a page that decayed from a page that never arrived, and that distinction is the whole point of this prompt.
Check the output at the "Ruled out" block first. If the three rejections cite reasons that do not appear anywhere in your input, the model picked a diagnosis it liked and reverse-engineered support for it. Rerun with the history quoted back at it. Then scan the change table for any row whose justification is the page's age. Those are the rows that turn a targeted revision into a rewrite.
The failure you will actually hit is a reflexive STALE. It is the diagnosis every refresh article trains a model to give, and it produces a satisfying list of small edits. The signature that contradicts it is impressions roughly holding while clicks collapse and average position slides over several periods; that is a match problem, not an aging problem. Also watch how the model reads the position column: Search Console averages position weighted by impressions, so a page-level average is not "where your keyword ranks", and a plan built on that misreading will target the wrong section.
If it returns NOT THE PAGE, do not treat that as a failed run. That branch exists because the most expensive refresh is the one performed on a page whose problem was a redirect, a sibling page competing for the same query, or a sitewide movement. It costs you one prompt to rule that out before anyone opens the CMS.