Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 0%, so the description must carry the load: it states 'supply exactly one ID' and maps the two IDs to 'owned application or active listing', establishing the mutual-exclusion rule. It stops short of naming which parameter corresponds to which target, so it doesn't fully close the gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.