Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must carry parameter meaning, and it largely does not. The three command variants (acknowledge, measure, complete_exercise) and their fields (incidentId, businessId, exercise, note, minutes, amountCents) are never described in prose; only the idempotencyKey gets any coverage via the reuse instruction. The agent is left to reverse-engineer the union schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.