Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only indicate readOnlyHint=false and idempotentHint=false, so the description carries the behavioral burden. It richly discloses what happens: the order goes straight to the business, returns a reference and status URL, conditionally returns pay_url or book_url, and explicitly states money goes to the business and never to Orbylon. This goes well beyond the basic mutation hint.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is compact yet dense, with the primary action and prerequisite front-loaded in the first sentence. Every subsequent sentence adds a distinct behavioral fact—routing, return values, payment handling, and appointment flow—with no filler or repetition of schema content.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description correctly takes responsibility for explaining return values, and it does: a reference, status URL, conditional pay_url, and book_url. It also covers the key trust-related behavior (money goes to the business) and the prerequisite link to list_business_offerings, making the tool safe for an agent to invoke without guessing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 71%, so most parameters are already documented in the schema. The description adds useful context about domain verification and the meaning of pay_url/book_url, but it does not materially explain the selection between item and item_id, or the fulfilment object's requirements beyond what the schema already states. It is adequate but does not compensate significantly for the undocumented parameters.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb-resource pair: 'Place an order for an item a verified business publishes', and immediately links to the sibling tool list_business_offerings for sourcing items. It clearly distinguishes this from the other business-list/readiness tools by framing it as the transactional ordering action.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives clear context: it is used after a verified business publishes an offering, and directs the agent to list_business_offerings for the item source. It does not explicitly state when not to use this tool, but the direct reference to the prerequisite and the contrast with the read-only sibling tools makes the usage scenario fairly unambiguous.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.