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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuine context beyond that: the SecDB data source, the structured Markdown return format, which fields may be absent ('if present', 'if included in the record'), and an explicit anti-hallucination instruction. It does not say what happens for a malformed or unknown CVE ID.

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?

Header-based structure is scannable and the purpose is front-loaded, but the field inventory is duplicated almost verbatim under 'What this tool does' and 'Outputs,' and the 'LLM usage guidelines' section restates the multi-CVE rule already given above. Roughly a third of the text is redundant.

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?

With no output schema, the description carries the return-value burden and does so thoroughly, listing every field family returned and the Markdown format. The only real gap is error/not-found behavior for an invalid CVE ID, which matters for a lookup tool with a single required key.

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 100% and the schema already documents cve_id with the same CVE-YYYY-NNNNN format string the description repeats. The description adds no syntax, validation, or normalization guidance beyond the schema, so the baseline 3 applies.

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 and resource ('Get detailed information about a specific CVE') and scopes itself explicitly to 'deep inspection of a single vulnerability,' which implicitly separates it from the multi-CVE siblings like vulnerability_search. The enumerated contents (CVSS, EPSS, advisories, CWE) make the resource concrete.

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?

Provides explicit when-to-use trigger phrases, states the multi-CVE handling rule ('call the tool once per CVE'), and names three complementary siblings (vulnerability_score, sightings_search, ssvc_calculator) with the condition for combining them. Nothing about selection is left to inference.

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