Saved content briefs for a project: the page plan CrunchJunkie generated for a tracked prompt where the brand is missing (target question, recommendations, page structure, schema to add, proof to include, a caveat), the evidence it was grounded on (the pages AI cited, the searches it ran and, with Search Console connected, evidence.existingPage), and the before/after visibility once the brief has been measured. Without promptId it lists the saved briefs; with promptId it returns that prompt's latest brief in full (search selects a fan-out-search brief). Reading generates nothing and costs nothing; create_content_brief generates one. The evidence quotes third-party pages and answers.