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

Annotations already mark it read-only and open-world. The description goes further by listing the OT-adjusted return fields, disclosing the $0.02 USDC x402 cost on Base mainnet, and explaining the unpaid-call PaymentRequired challenge and retry mechanism with _meta["x402/payment"].

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 front-loaded with purpose, then returns, cost, and payment failure handling. Every sentence adds practical information, with no filler or redundant restatement of the schema.

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 usefully enumerates the returned fields and explains the paid-call behavior. It is nearly complete for invocation, though it does not cover data freshness, missing-CVE behavior, or exact response structure.

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 single id parameter is documented in the schema as a CVE identifier with an example. The description adds no additional parameter syntax or usage detail beyond what the schema already provides.

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: CVE lookup enriched for ICS/SCADA environments. It lists the OT-specific outputs, making the scope clear, but it does not explicitly distinguish itself from any sibling tool by name.

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 gives clear context for when it applies: CVE lookup enriched for ICS/SCADA environments. It also explains the paid invocation flow, but it does not name alternatives, exclusions, or when-not-to-use cases.

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