Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with both parameters (async, domain) described. The description only mentions 'Input: a domain', adding no extra meaning beyond the schema. It doesn't explain the async parameter, but the schema covers it. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.