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

With no annotations, the description carries the full burden and does most of it: shipping is included and computed by the store, pickup is free, payment is by bank card, and the order is only created after successful payment. It stops short of failure behavior — out-of-stock items, price changes between link creation and payment, link expiry, or idempotency of repeated calls are all unstated.

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?

Purpose and return value are front-loaded, and the mode/restriction details follow in a logical order. A few clauses restate what the delivery enum description already says (free pickup, no address), which is minor redundancy rather than filler.

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 3-parameter mutation tool with no annotations and no output schema, the description supplies the essentials: what it produces (a payable URL), what happens afterward (automatic order creation), and which products are out of scope. The main missing piece is error/precondition handling for a checkout flow.

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 the baseline is 3; the description nevertheless adds real meaning beyond the schema by clarifying that home-delivery shipping costs are INCLUS and calculated by the store, that retrait requires no address and is GRATUIT, and that the Point Relais alternative is priced in the response. Item quantity/productId semantics and the optional customerEmail are left entirely to the schema.

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?

Opening sentence names a specific verb and resource: creating a secure Stripe payment link for a Cadorama cart. It immediately distinguishes this from read-only siblings like check_payment by stating the return is a URL the user must open to pay, after which the order is created automatically.

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?

It spells out both supported modes (home delivery in mainland France vs free in-store pickup with delivery: "retrait"), and explicitly names what cannot be ordered here — age-restricted, fresh/frozen preorder, and variant products must be ordered on the website. It also imposes a behavioral rule on the agent: warn the user about cheaper Point Relais or other lower-cost options before sending the link.

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