Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must compensate. It explicitly enumerates the allowed values for 'lang' (en, de, es, pt, fr, tr, ar), which the schema itself does not provide. This fully specifies the only parameter and leaves no ambiguity.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.