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

The description adds real value beyond annotations: it explicitly states nothing is ordered or charged, that the user reviews and pays on patchdesign.ai, and implicitly that the return value is a URL. With readOnlyHint/idempotentHint already covering the safety profile, this is strong supplementary context, though it omits the link's expiration or any auth requirements.

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?

Three tight sentences, front-loaded with what the link contains before the important 'no charge' clarification and then the usage trigger. Every sentence carries information, with only the type/size mention being slightly extraneous.

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?

For a read-only link-builder with no output schema, the description covers what the link is, what it costs (nothing), where payment happens, and when to use it. An agent could call this correctly without opening the schema.

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 coverage is 100%, so designId and quantity are already fully documented (including the price-break default). The description repeats quantity and adds 'type' and 'size', which are not parameters at all, adding mild confusion rather than meaning. Baseline 3 is appropriate.

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 states a specific artifact – a link that pre-fills type, size, quantity and price for ordering a design – which is concrete and clearly distinct from quote_patch and sign_in_link. It is phrased as a noun ('the link') rather than a verb, and the title 'Order a design' oversells the action, but the body immediately corrects that.

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?

Explicit trigger conditions are given: use it when the user wants to buy, get a quote by email, or adjust size/quantity on the site. No when-not guidance or named alternatives are provided (e.g. it does not say when to prefer quote_patch over this link), so it stops short of a 5.

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