vt_domain

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

No annotations provided. The description mentions requiring an API key but does not disclose other behavioral traits like rate limits, data freshness, or whether the operation is read-only (though implied). Missing details on output format or pagination.

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?

Exceptionally concise: one sentence listing outputs plus a note about the API key. Front-loaded with purpose, no wasted words.

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?

Adequate for a simple tool with one parameter and no output schema, but lacks usage guidelines and behavioral context. The list of outputs is useful but not exhaustive.

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?

Only one parameter 'domain' with schema description 'Domain to analyze'. Schema coverage is 100%, so baseline is 3. The description adds no extra meaning beyond the schema.

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 performs 'VirusTotal domain analysis' and lists specific outputs like reputation score, detection stats, categories, registrar, DNS records. This distinguishes it from siblings like vt_ip or vt_subdomains.

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 guidance on when to use this tool versus alternatives such as vt_ip or vt_subdomains. Only mentions requirement of VT_API_KEY.

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