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

Annotations already declare readOnlyHint, destructiveHint=false and closed-world behavior, so the safety profile is covered. The description adds meaningful extra context: it will not echo header values (a privacy guarantee), it is free with no key/credits/wallet, and existing source/input limits apply. The unstated part is what limits actually are and what the audit report contains.

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?

Purpose is front-loaded in the first sentence and the remaining sentences are short. The pricing/access sentences ("FREE during validation. No key, credits, wallet...") are somewhat promotional filler but do convey access constraints, so the text largely earns its place.

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 format need not be explained. However, for a security audit tool with a nested, undocumented input object, the description omits which headers/checks are evaluated and how the header map should be keyed, leaving a real gap given 0% schema coverage.

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 single required parameter is a nested object with a headers map, yet the description only says "supply your task in input." It never explains that input.headers is a name-to-value map of response headers, so the most important semantic detail is left only to the schema shape.

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+resource: reviewing supplied response headers for security and CORS issues. The resource (response headers) is distinguishable from sibling audits like security_cookie_audit and security_csp_audit, though the description never names them to sharpen the boundary. "Selected security and CORS issues" is slightly vague about which checks run.

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?

No when-to-use or when-not-to-use guidance, and no routing to alternatives such as security_csp_audit or security_cookie_audit for narrower scopes. "Supply your task in input" tells the agent how to call it but not when this tool is the right choice.

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