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

With no annotations, the description carries the burden and does so reasonably: it discloses that this is a pure lookup returning a static URL and explicitly disclaims live pricing retrieval and checkout side effects. It omits any note on auth requirements or what happens for unknown products, but for a zero-param, side-effect-free getter the disclosed traits are the relevant ones.

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 tight sentences, front-loaded with the return value and followed by the scope exclusions. Every clause earns its place with no 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?

There is no output schema, and the description compensates by stating that the return is a public pricing page URL. It does not mention behavior when the product or page is unavailable, which is a minor gap for such a simple tool.

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?

The tool takes zero parameters, so the baseline is 4. There is nothing parameter-related for the description to clarify, and it correctly does not invent parameter behavior.

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: 'Return the public pricing page URL for Seedance 3.0.' The behavior is unambiguous and distinguishable from a data-fetching tool. It does not explicitly differentiate itself from siblings like get_product_info, so it falls short of a 5.

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 line 'Does not fetch live prices or create checkout' sets clear negative boundaries, telling the agent when this tool is unsuitable and steering it away from expecting price data or a purchase flow. No sibling alternative is named, so it is not a full when/when-not routing statement.

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