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

The description says 'Uses buyer-supplied information only; no external research or outbound actions,' which directly contradicts the annotation openWorldHint=true, indicating the tool may draw on open-world information. Because the description contradicts an annotation, the rubric requires a score of 1. Other behavioral details like price and wallet authorization are helpful, but the contradiction is a serious reliability issue.

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 description is three tight sentences with no filler. It front-loads the core purpose and content sections, then adds constraints, cost, and payment requirements concisely. Every sentence carries meaningful information.

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?

It includes important practical context: the price, explicit wallet authorization requirement, and the fact that the output is a draft for human review. However, it is undermined by the contradiction with openWorldHint and provides no parameter semantics, leaving an agent with an incomplete and partially misleading picture for such a financially consequential operation.

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 schema has 0% description coverage, and the description does not explain the required 'brief' parameter or the optional 'audience' and 'source_text' fields. The phrase 'buyer-supplied information only' is too generic to help an agent understand what to pass in each parameter. The description therefore fails to compensate for the lack of schema documentation.

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 verb and resource: 'Draft a service page' and enumerates the content sections (fit, scope, process, deliverables, exclusions, next steps). This clearly differentiates it from sibling tools like about page copy, product description, or landing page copy. It also adds concrete constraints and delivery context, so there is no ambiguity about what the tool produces.

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 makes the usage context clear: it is for drafting service page copy based on buyer-supplied information, and it explicitly notes that no external research or outbound actions are performed. However, it does not name sibling tools or explicitly state when to choose this over about page copy, homepage copy, or other related generators, so it stops short of full alternative guidance.

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