A brief that only lists headings produces a page that only lists headings. The second column is the one that decides whether the piece is worth reading, and the third is what stops it being generic.
A brief structured around the questions a page must answer, in the searcher's own words, plus what the pages ranking above cover that yours does not.
There is no target word count and no keyword density field, deliberately.
Fill the questions section from the queries actually reaching the cluster. Use their phrasing, not your product's vocabulary — that mismatch is why many pages fail.
Then list what competing pages cover. This is a comparison of substance rather than of length.
It will not write the page or tell you how long it should be. The length is whatever answers the questions.
It also cannot judge whether the topic is right for you.
Answer each question in the first sentence of its section. Somebody arriving from a search wants the answer, not a preamble about why the topic matters.
Define success before publishing: these questions answered, this cluster moving. Otherwise the review afterwards is just opinion.
No, deliberately.
Yes — it is what makes the page match.
Yes, no email required.
Half an hour on your own figures, and an honest answer about the parts Treepie does not improve.