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 both run_id and the approvals array with field-level descriptions. The description mostly rephrases the schema's minItems and the run stays paused until all answered. It adds no new parameter-specific semantics, so per the baseline for high coverage, a 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.