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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world behavior, so the safety profile is covered. The description adds genuinely new context the annotations cannot convey: this invocation costs $50.00 USDC via x402, a payment/auth prerequisite the agent must surface. It stops short of describing return shape or latency.

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 with zero filler. The functional purpose is front-loaded and the pricing constraint follows immediately.

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 single-parameter tool with no output schema, the description should sketch what comes back (e.g., a scored report or findings list) and how the x402 payment is settled, and it does neither. It is adequate to trigger a call but leaves return values and payment mechanics undefined.

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 0% and the description never names or explains the 'text' parameter, its format, or the 24,000-character cap. It only weakly implies that the landing-page copy is the input, so it partially compensates for the coverage gap but not fully.

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?

Specific verb (audit) plus resource (short landing-page copy) and the four criteria checked (clarity, outcome, CTA, readable length). It does not, however, distinguish itself from the sibling 'site-copy-review', which sounds like an overlapping capability, leaving the agent to guess which to pick.

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 scoping phrase 'short landing-page copy' implies a use case and implicitly excludes long-form or non-landing-page content, but there is no explicit when-to-use guidance and no direction to a sibling tool for longer or broader copy review.

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