Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the schema already documents all five parameters. The description adds meaningful value by explaining the 90-day default expiry, the refresh semantics of re-calling, and that forever must be explicitly passed for permanence. This goes beyond the minimal baseline without needing to restate the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.