Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool has zero parameters, so the schema provides no parameter semantics. The description compensates by explaining the output behavior in different states, which is the only relevant semantic information. With 0 params, baseline is 4, and the description meets that by clarifying the return values.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.