Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema already covers 100% of the single parameter 'code' with a description. The tool description adds that it accepts a snippet, function, class, or module, enriching the semantic understanding of what can be passed, going beyond the schema's basic 'JavaScript code' label.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.