reverse_dns_lookup

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

The description discloses the cost ($0.001 USDC via x402), which is a useful behavioral trait, but it does not state the actual operation, expected inputs, or side effects. With no annotations, this is minimal disclosure that leaves the agent largely uninformed.

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 very short and front-loaded, but it is under-specified rather than concise. It contains a dash, a category label, and a cost note, but no actionable content about what the tool does, making the brevity a drawback.

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?

For a network tool with no output schema and minimal annotations, the description is incomplete. It does not explain the tool's function, expected parameters, or return value, leaving the agent to guess based solely on the name.

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 input schema only has a generic 'params' object with the description 'Tool parameters as JSON object', which provides no meaningful parameter details. The description does not mention any required or optional parameters (e.g., IP address or hostname), so the agent cannot infer how to invoke the tool.

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 simply restates the tool name ('reverse dns lookup') and labels it as a 'Security & Network tool', without a specific verb or resource. It fails to distinguish from the sibling 'dns_lookup' tool, providing no actual purpose beyond the name.

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 is provided on when to use this tool versus alternatives like 'dns_lookup' or 'whois'. The only additional context is the cost, which does not help with usage selection.

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