Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the baseline is 3. The description adds minor context (e.g., 'colony you founded' for colony_name, 'the moderator/admin to hand the colony to' for recipient_username), but these largely overlap with the schema descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.