Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema covers the only parameter txid with a description 'Transaction ID.' The tool description adds little beyond that, merely restating it as the identifier. With 100% schema coverage, a 3 is baseline, which is appropriate since the description does not provide extra meaning (e.g., format, examples, or constraints) beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.