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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds that results carry a 'source' field and clarifies the scan_id provenance, which is useful but modest; no rate limits, pagination, or failure behavior 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?

Three short sentences, front-loaded with the resource definition followed by benefit and parameter note. Every sentence contributes; nothing is padded, though the benefit sentence is the weakest of the three.

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 single-parameter read tool with an output schema present, the description covers purpose, output nature ('with their source'), and the required parameter. Return-format detail is rightly left to the output schema, so no critical gap remains.

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 carry the parameter, and it does: 'scan_id is the UUID of a ScanMalware scan' tells the agent the expected format (UUID) and where the value originates. That is meaningful added value beyond the bare schema for the single required parameter.

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 ('List') and a precise resource ('CPE identifiers in the NVD format derived from technologies detected on a scanned page, with their source'), and the mention of 'derived from technologies' scopes it well. It does not, however, explicitly differentiate itself from close siblings like search_cpe or get_technologies_by_scan.

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?

'Useful for matching against vulnerability data' implies a downstream use case but gives no explicit when-to-use, when-not-to-use, or named alternative. The agent can infer this is the per-scan CPE lookup versus the search-style search_cpe, but nothing states that.

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