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 does not add new information about the parameters (ideaId or visibility) beyond what the schema provides. However, it implies the idea tier determines cost, which is not in the schema, but this is a minor addition. No parameter-specific detail is added.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.