Spend your effort on candidate_pages. A list of bare URLs produces a confident, useless plan, because the model reads the slug and invents what the page contains — /blog/margin-vs-markup becomes "explains how to set margin on electrical work" and the link goes in. One line per page describing the question that page answers is the difference between a plan you hand to an editor and a plan you verify link by link. If your site is large, do not paste the whole sitemap; paste the twenty or thirty pages in the same topic area, since those are the only ones a reader would move to anyway.
Read the output in an order that feels backwards. Start with the overlapping pages list, then the rejected candidates, then the table. The overlap list is the part people skip, because it turns a linking task into a content decision nobody scheduled — but "these two pages answer the same question, and linking them just hands the reader a near-duplicate" is worth more than five well-placed anchors. When that list comes back empty on a mature site, it usually means the descriptions you supplied were too vague to compare, not that nothing overlaps.
The failure you will actually hit in the table is a link placed where the phrase appears rather than where the question forms. It is easy to miss because the sentence reads fine. Cover the destination column and read only the section and the reader question: if the question is one the section itself answers two sentences later, the link is premature and the reader bounces back. The second failure is anchor text that is the destination's title pasted in, five times down the page, which reads like a directory rather than an argument.
When a section comes back wrong, rerun that section alone — paste back the section text, the candidates you still consider live, and what was wrong with the proposal. Regenerating the whole page reshuffles placements you had already accepted, and you lose the reconciliation against existing_links with it.