Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverade is 100%, so both asn_id and account_id already have descriptions in the input schema. The description's 'for an ASN' reinforces that asn_id is the primary subject but adds no additional formatting, units, relationship, or usage semantics beyond the schema, so the baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.