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

Annotations already declare readOnlyHint, openWorldHint, and idempotentHint, so the safety profile is covered. The description adds that checks are 'reproducible' and run 'remote', which is meaningful context, but says nothing about cost, caching behavior, rate limits, or what happens with unreachable URLs.

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?

A single front-loaded sentence with zero filler; the action and scope lead and nothing is padded. Concise and well structured for its size.

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?

An output schema exists, so return values need not be explained. But for a 3-parameter tool with 0% schema coverage and no sibling differentiation, the description leaves the agent guessing on both parameter meaning and tool selection.

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%, so all three parameters (url, max_age_ms, response_mode) are undocumented anywhere. The description's mention of check categories does not explain max_age_ms caching semantics or what minimal/standard/evidence response modes return, leaving the enum choice to guesswork.

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 names a specific action (run checks) against a specific resource (a public webpage) and enumerates the check categories (HTTP/HTML/SEO/accessibility), so an agent knows what it does. It stops short of differentiating itself from the overlapping sibling website_audit, leaving the boundary to inference.

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?

There is no statement of when to use this tool instead of website_audit, source_snapshot, or verify_claim, and no prerequisites or exclusions given. The only implicit constraint is 'public webpage', which an agent must infer as a scope limit.

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