reverse_dns

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

The description provides minimal behavioral information beyond the operation itself. It mentions input formats and default DNS server, but does not disclose whether it is read-only, error behavior, timeout, or return characteristics. Since no annotations are provided, the description fails to carry the burden of behavioral transparency.

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 extremely concise, front-loaded with the purpose, followed by concise parameter bullets. Every sentence adds value without redundancy.

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 simplicity and the presence of an output schema, the description covers the main input semantics. However, it lacks usage guidelines and behavioral details such as error handling or read-only status, making it incomplete for a fully self-sufficient description.

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 has no descriptions for properties (0% coverage), and the description effectively compensates by explaining each parameter, including an example for ip_address and the default for dns_server. This adds meaningful semantic value 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 explicitly states 'Perform a reverse DNS lookup on an IP address,' clearly identifying the verb and resource. It does not explicitly contrast with sibling tools like dns_lookup, but the reverse nature is clear from the name and description.

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 explicit guidance is given on when to use this tool versus alternatives such as dns_lookup. The intended use case is implied by the tool's name and description, but there are no exclusions or alternative recommendations provided.

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