Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema is empty (0 parameters), so schema coverage is 100%. The description adds contextual meaning by indicating the tool's functionality (connectivity and key validity), which helps the agent understand that no parameters are needed and that the tool performs a configuration check. The baseline for 0 params is 4, and the description reinforces this without adding unnecessary detail.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.