Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the baseline is 3. The description enumerates the sections returned, which loosely maps to the all_sections parameter, but it does not materially clarify either parameter beyond what the schema already explains (format, default behavior, omission semantics).
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.