Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents both 'key' and 'folder' adequately. The description simply restates 'by key and folder' without adding extra semantic meaning, such as key format, folder path rules, or what constitutes a valid memory entry. This matches the baseline for full schema coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.