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

With no annotations, the description carries the full burden and does reasonably well: it discloses the data source, the return content (CVSS severity, description, affected products, references), and a per-call cost of 1 credit. It omits auth/permission needs and error behavior for invalid IDs, but the cost and output disclosure are genuinely useful.

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?

Two tightly packed sentences, front-loaded with the action and modes, followed by return values and cost. No filler; every clause adds 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?

No output schema or annotations exist, and the description compensates by describing return fields and cost. It is nearly complete, though it leaves the 'limit' parameter and any optionality rules (0 required params) unexplained.

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 coverage is 0%, so the description must compensate. It explains the semantics of cve_id and keyword (the two ways to query), but never mentions the 'limit' parameter or the required CVE-ID format, leaving one of three params undocumented in both schema and description.

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?

States a specific verb (look up / search) and resource (CVE vulnerabilities), names the authoritative data source (NVD), and distinguishes the two operating modes (ID lookup vs keyword search). An agent can immediately tell what the tool does.

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?

The description implies how to choose between the two modes ('look up a CVE ID, or search recent vulnerabilities by keyword'), but gives no explicit when-to-use guidance or exclusions relative to other security tools like web_search or ioc_extract. Usage is implied rather than stated.

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