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

Annotations already mark it non-read-only, open-world, non-idempotent, and non-destructive; the description adds meaningful context: price, in-memory-only processing, no storage, paid retry re-sends the URL, and non-certification limits. It does not cover payment failure/refund behavior, but it substantially exceeds annotation coverage.

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 sentences, front-loaded with price and deliverable, followed by privacy/retry/disclaimer details. Dense but without filler, though the first sentence is long and could be easier to scan.

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 paid open-world audit with no output schema, the description covers report contents, cost, privacy, retry semantics, and scope limitations. It omits explicit sibling routing and payment mechanics, but is otherwise sufficient for correct invocation.

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?

There is only one URL parameter and schema coverage is 100%, including public http/https and authorization guidance. The description reinforces 'one submitted URL' and retry behavior but adds no syntax or format beyond the schema, so baseline 3 is appropriate.

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: audits one submitted URL for agent-readiness and returns a verdict/score, per-criterion evidence, and a fix list. It clearly describes the paid full-report deliverable, though it does not name sibling tools like readiness_precheck or readiness_criteria to sharpen differentiation.

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?

Provides cost and retry context and a scope exclusion ('does not certify the business, its safety, or its honesty'), but never says when to use this instead of readiness_precheck or readiness_criteria, nor whether a precheck should be run first. Usage is only implied.

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