Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so sequence_id, body, idempotency_key, and nested fields like recipient, message_ids, and subscriber_id are already well documented in the schema. The description adds no per-parameter detail, but that is acceptable given the schema already carries the semantic load.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.