Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema already provides descriptions for all parameters (agent_id, order_id, session_token) with 100% coverage, so the baseline is 3. The description adds a slight semantic enhancement by emphasizing that agent_id must be the owning agent, but it does not clarify the purpose or format of order_id or session_token beyond the schema's existing descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.