Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% — page, per_page, search, and category are all documented in the schema, including the note that category ids come from any prior response's categories[].id. The description only echoes that filtering exists, adding no syntax or format detail beyond the schema, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.