Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3, but the description clarifies that `prompt` accepts a slug, registry number, or exact title, and that `values` are the user's details used to fill the {{blanks}}. It also adds the important constraint that unfulfillable blanks should be asked about, not fabricated.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.