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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds real context beyond that: the auth requirement (Cotlet API key with app access) and, importantly, what the response body actually contains, which matters since there is no output schema.

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 first and second sentences substantially restate each other ('One order with items, SKUs...' vs 'Returns one order in full: each item with SKU, quantity and wholesale price'), wasting roughly a sentence. The content is front-loaded and accurate, but the redundancy is avoidable.

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 present, the description usefully enumerates the return shape and the total-derivation rule, and it covers the auth precondition. It is nearly complete for a single-read tool; only explicit sibling routing is absent.

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 100% and the only parameter, order_id, is documented in the schema with a concrete example format. The description adds no further parameter meaning, so the baseline of 3 applies.

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?

States a specific verb and resource (get one Faire order) and enumerates the returned content: item lines with SKU/quantity/wholesale price, ship-to address, shipments, and the total definition. An agent can tell this is a single-order fetch rather than a list, though no sibling (e.g. faire_list_orders) is named explicitly.

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 implies retrieval of an existing order and notes the required Cotlet API key with app access, which is a useful precondition. However, it never states when to use this versus faire_list_orders or the shipment/accept siblings, leaving routing to inference from the name.

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