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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description adds genuinely new behavioral context beyond them: which tools need a CookieInspector API key, that quotas are surfaced, and a scope disclaimer ('technical findings, not legal advice'). It stops short of describing the response shape or how quotas are expressed, but that is a minor gap given the 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?

Three sentences, all front-loaded and purposeful: what it covers, when to call it, and the legal-advice disclaimer. The first sentence is dense with a long parenthetical enumeration, which is informative but slightly heavy for a single line.

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?

With no output schema and no parameters, the description carries the full burden and discharges it: it previews the returned content categories, the account/quota information the caller will learn, and the limits of the advice. Nothing an agent needs before calling this orienting tool is missing.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a no-argument tool applies. No misleading parameter hints are given.

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 ('Describe') and enumerates the concrete resource content: cookies and trackers before/after the consent click, banner behaviour, consent platform, Google Consent Mode. It also establishes its role as the meta/discovery tool in a family of scan-oriented siblings, so an agent can distinguish it from get_scan_findings or list_scans without opening a schema.

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?

'Call this first when unsure which tool to use' is an explicit routing rule that tells the agent exactly when this tool beats the alternatives. Combined with the stated coverage of account requirements and quotas, the agent knows this is the entry point for orientation rather than for retrieving actual scan data.

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