Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema provides no descriptions (coverage 0%), so the description is essential. It fully defines each parameter: state accepts either two-letter abbreviation or 2-digit FIPS, county_fips is a three-digit code with a note that omission returns all counties, and year specifies ACS 5-year estimate with a default of 2022. This adds substantial meaning beyond the bare schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.