Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so both the purpose and description parameters are already fully documented in the schema, establishing a baseline of 3. The description adds examples of the kinds of data to mention (other courts, states, case types, fields, documents), but it does not clarify how to distinguish the purpose parameter from the description parameter. This is baseline-level value over the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.