Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% coverage, with descriptions for every parameter (status, horizon, place, corridor, brief). The description repeats the filter categories at a high level ('status (pending / resolved / obsolete), horizon (imminent / near-term / structural), or scope (place / corridor / brief)') but adds no new syntax or format details beyond the schema. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.