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

Goes beyond the readOnlyHint/openWorldHint annotations by disclosing the real behavioral shape: the tool only prepares a link and a human must complete payment, which prevents an agent from assuming a completed transaction. It doesn't cover link expiry, single-use behavior, or whether repeated calls create duplicate drafts.

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?

Two short sentences, zero filler, with the return value and the human-confirmation constraint front-loaded.

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?

No output schema exists, so the description correctly explains the return value (a link) and the human confirmation step. For a tool with a nested addons object and enum-driven products, remaining gaps (link lifetime, add-on sourcing) are minor.

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% with enums, defaults and the product/plan coupling already documented, so the baseline is 3. The description only implies that parameters are baked into the returned link and adds no extra meaning.

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 concrete outcome: it returns a configured link to the product page rather than performing a purchase. The verb/result is specific, though it never names the sibling tools (create_quote, get_price) to sharpen the boundary.

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 explains the human handoff step (open link, enter details, confirm, payment approved by a human), which implies when this is appropriate, but it gives no explicit when-to-use vs create_quote or get_price, and no prerequisites such as fetching add-on ids via get_price.

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