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

With no annotations provided, the description carries the burden of conveying behavior. It mentions the cost ($1.00) and the specific categories analyzed, which is useful. However, it does not disclose details like response time, potential limitations (e.g., if domains are unreachable), or whether the analysis is real-time or cached. The cost disclosure adds transparency, but more behavioral context would be beneficial.

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?

The description is concise and information-dense. It conveys the purpose, cost, inputs, output structure, and evaluation criteria in two sentences. No wasted words, and the most important details (what it does, cost) are front-loaded.

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 the tool's moderate complexity (two simple string parameters, no output schema), the description provides a complete picture: what the tool does, what it covers, and what output to expect. The description compensates for the lack of annotations and output schema by detailing the 8 dimensions and the verdict. No significant gaps.

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 schema coverage is 100%, with parameter descriptions for domain1 and domain2. The description restates the requirement ('Pass two domains') but doesn't add new meaning beyond what the schema provides. It does clarify the output structure (head-to-head comparison), which indirectly aids understanding, but for parameters themselves, it's baseline.

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 clearly states the tool's purpose: a competitive analysis report comparing two domains across 8 specified dimensions. It distinguishes itself from siblings like site_audit or domain_enrich by focusing on head-to-head comparisons and returning a winner per category and overall verdict.

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 description implies when to use it (for competitive analysis between two domains) and lists the exact input requirements. It doesn't explicitly state when not to use it or name alternatives, but the clear focus sets expectations. It could mention that it's not for single-domain audits, but overall adequate.

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