Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3. The description repeats the indicator names and country code format already in the schema, adding minimal new meaning. The 'async' parameter is not mentioned, but it is covered in schema. Overall, the description adds marginal value.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.