Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The only parameter, brandId, is fully described in the schema with 'The brand identifier,' so schema coverage is 100%. The description adds implicit context by linking brandId to audience composition and balance distribution, but does not add syntax or format details beyond the schema, aligning with the baseline of 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.