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

Discloses payment model ($0.02 USDC per call via x402 on Base) and response format (JSON). No annotations provided, but description covers cost and automatic payment, which is critical behavioral info.

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, no fluff. Includes essential info (what, use cases, cost). Could be slightly tighter but effective.

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?

Given no output schema and two simple params, the description is fairly complete: covers purpose, return fields, use cases, and payment. Missing explicit return structure details, but fields are listed.

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 already describes both parameters fully (coverage 100%). Description adds no new meaning beyond what schema provides; it just restates 'URL or domain' and 'Max snapshots'.

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?

Clearly states the tool retrieves archived history from Internet Archive Wayback Machine with specific fields (first-seen, last-seen, total snapshots, distinct versions, timeline). Distinguished from siblings like brand-visibility, web-search, etc.

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 clear usage contexts: domain due-diligence, brand history, change tracking. While it does not explicitly state when not to use or alternatives, the guidance is adequate for selection.

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