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 details. The description mentions the inputs the calculator takes, but that's about the calculator, not the tool's own inputs. Since there are no parameters, the description doesn't need to add parameter semantics; a baseline of 4 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.