Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents subjectSlug, intent, and sectionScores thoroughly. The description adds a useful high-level workflow for sectionScores ('Call with no sectionScores to see which sections the subject has'), but this mostly mirrors the schema's own guidance to 'Omit to discover the subject's card structure first.' Thus the description adds only marginal value beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.