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

With no annotations provided, the description carries the full burden of explaining behavior, but it only lists data categories. It does not disclose whether the tool performs a read-only lookup, how the 'q' parameter affects behavior, what happens with an empty query, or any network/rate-limit constraints.

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 text is short, but this is under-specification rather than conciseness. It opens with 'PeeringDB:' which merely repeats the name and title, and the remaining fragment is not structured as a coherent capability statement.

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?

Despite having only one optional parameter and an output schema, the definition is still incomplete because the input semantics are entirely unknown and there is no behavioral or usage context. An agent cannot reliably know what to pass for 'q' or what kind of response to expect in terms of tool intent.

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 one parameter, 'q', with no schema description and 0% schema description coverage. The description does not explain what 'q' should contain, such as an ASN, organization name, or search string, so the agent cannot construct a correct invocation.

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 is largely a restatement of the tool name ('PeeringDB:') followed by a list of data categories ('Network type, traffic, IX/facility presence'). It does not state a concrete verb or action such as 'search', 'lookup', or 'get', so an agent cannot tell whether this retrieves, searches, or summarizes PeeringDB data.

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 guidance on when to use this tool instead of related siblings like asnlookup, peeringnet, or peers. No context, prerequisites, or exclusions are given, so an agent has no basis for choosing this tool over nearby alternatives.

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