RDAP Lookup

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

No annotations are provided, so the description carries the full behavioral burden. It usefully discloses that no API key is required and that it uses the public rdap.org service, but says nothing about rate limits, latency, error behavior for unroutable/private IPs, or the shape of the response for a read tool with no output schema.

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?

A single front-loaded sentence with no filler. Every phrase (service used, returned fields, no auth) earns its place.

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 no-annotation, no-output-schema tool with an undocumented parameter, the description leaves out too much: input format, error/edge-case behavior, and how results differ from sibling IP tools. It is under-specified for correct invocation.

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 description coverage is 0% and the single 'ip' parameter has no description, so the description must compensate. It implies the input is an IP address via 'IP ownership' but adds no format guidance (IPv4 vs IPv6, public-only restriction, CIDR support).

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 states a specific verb (looks up) and a clearly defined resource (IP ownership/network registration data), listing the concrete fields returned (RIR, netblock, org, country). It is distinguishable from the unrelated logging/search siblings, though it doesn't explicitly contrast with the closest neighbor, ip_reputation/get_ip_context.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no mention of alternatives such as ip_reputation or get_ip_context which appear to cover overlapping IP-context territory. Usage is only implied by the subject matter.

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