Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The only parameter, locale, is constrained by enum ['es','en'] and default 'es' in the schema, but the description provides no explanation of it. With schema description coverage at 0%, the description should compensate by noting that locale selects the guide's language, and it does not. Invocation is still feasible because there is one optional, fully constrained parameter, so this is below baseline but not broken.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.