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

The description goes well beyond the annotations by explicitly disclosing that the tool charges 0.25 USD and requires explicit wallet authorization, matching the destructiveHint. It also states that the output is only a draft for human review and that it makes no external research or outbound calls. This is valuable context for an agent deciding whether to invoke a paid, state-changing tool.

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 compact and front-loaded with the core purpose, followed by constraints, output nature, and payment details. Each sentence contributes information an agent needs, with no filler or repetition.

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?

The description covers the main operational aspects: what input to provide, what output to expect, and the payment requirement. However, it does not explain how the nested input fields map to the task (e.g., what 'brief' versus 'source_text' means), and it does not describe the mechanics of result signature or expiry fields. For a paid tool with no output schema, this is a noticeable gap.

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?

With 0% schema description coverage, the description must compensate, but it mentions only that input comes from supplied products/services and buyer-supplied information. It does not clarify the roles of 'brief', 'source_text', 'audience', or the payment/result signature fields. This leaves the agent to guess parameter semantics from names alone.

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 action ('Write category-page copy'), a clear resource ('category-page'), and the input source ('supplied products/services'). It also names two distinct deliverables (selection guidance, internal-link suggestions), which sets it apart from sibling copywriting tools like homepage_copy or service_page_copy.

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 clearly indicates when to use the tool: when category-page copy is needed from buyer-supplied product/service information. It also implies a limitation ('no external research or outbound actions'), which helps agents avoid using it for research-heavy tasks. However, it does not explicitly name alternative tools or exclusion criteria beyond that constraint.

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