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

Annotations already cover the read-only safety profile, and the description adds useful behavior beyond them: it discloses the freshness signal ('when Botworthy last scanned it') and the miss-path behavior ('If the site hasn't been scanned, says whether a scan is queued'). No rate limits or failure modes for malformed URLs are mentioned, and 'Accepts any URL or domain' sits slightly uneasily with openWorldHint=false, though not enough to be a direct contradiction.

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?

It is one dense sentence plus two short ones, front-loaded with the lookup purpose and the scan-freshness qualifier. The enumeration of five tasks and their control role/accessible-name payload is justified detail, though the sentence is long enough to be slightly heavy to parse.

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, the description carries the burden of describing returns and does so concretely (blocked status, 0-100 score, advice, per-task outcomes and steps). What is missing is secondary: error behavior for invalid input and the response shape when nothing is cached beyond the queued-scan note.

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 coverage is 100% and the single parameter already has an example of both URL and bare-domain forms, so the schema does the heavy lifting. The description's 'Accepts any URL or domain' restates rather than extends that meaning, making the baseline 3 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?

The description gives a specific verb and resource ('Look up how well an AI agent could use a website ... when Botworthy last scanned it') and enumerates the returned data (blocked status, score out of 100, advice, five task outcomes with control role and accessible name). It does not name the sibling tools, so the boundary with request_scan/report_visit is only implied by the mention of queued scans.

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 title sets the intent ('Check a website before visiting it') and the description states 'Accepts any URL or domain', which implies pre-visit lookup usage. However, it never explicitly says when to call request_scan instead (e.g., when a scan is missing) or when report_visit applies, leaving the routing decision to inference.

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