Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% for the single parameter, so the baseline is 3. The description adds value by listing potential opportunity categories (customer, talent, contract, capital), giving the agent hints about what the nested 'opportunity_type' field might contain beyond the schema's generic 'registered Opportunity Scout types' phrasing.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.