Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema covers 100% of parameters with a description: 'Database name (optional, uses default from session if not provided)'. This is informative and adds meaning. The tool description does not add extra parameter info, but the schema itself is sufficient, so a score of 4 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.