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

With no annotations, the description carries the full burden of behavioral disclosure. It only adds the 'real-time' attribute, but does not state whether the tool returns raw feeds, filtered results, rate limits, or how the named sources are combined. No side effects or data scale are disclosed.

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 a single terse phrase, concise and with no wasted words. However, it is under-specified; it functions more as a title than a structured description, and the brevity comes at the cost of necessary parameter and usage information.

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 an output schema and only one optional parameter, the description is incomplete. It does not state what the tool returns (e.g., recent vulnerability list, aggregated advisories), how the 'q' parameter affects results, or whether sources are combinable. The agent cannot correctly infer invocation semantics.

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 description does not explain the 'q' parameter at all. An agent cannot tell whether 'q' is a search query, a source filter, or a feed category. The description adds zero meaning beyond the bare property name in 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 names a resource (vulnerability feeds) and three specific sources (NVD, Exploit-DB, PacketStorm), which clarifies its scope relative to the generic 'feeds' sibling. However, it lacks an explicit verb (e.g., list, search, aggregate) and does not distinguish it from closely related siblings like 'cve' or 'nvdcve'.

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 versus alternatives such as 'feeds', 'cve', or 'exploit_cve'. No intended use cases, prerequisites, or exclusions are mentioned, leaving the agent to infer suitability on its own.

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