Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema shows a single parameter, product_id, with 0% description coverage. The description's phrase 'by id' adds a minimal level of meaning by confirming that product_id is the identifier, but it does not explain accepted formats, constraints, or how to handle the number/string union. It partially compensates for the schema gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.