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

Annotations already declare readOnlyHint=true and openWorldHint=false. The description earns some credit by confirming the data source is local ("suppliers in the index"), consistent with the non-open-world hint, and by listing what the answer covers. It does not describe response structure or how missing standards are handled, so it goes beyond annotations only modestly.

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?

A single dense sentence that front-loads the output contents and puts the concrete standard names early. No filler, though the elliptical fragment style is slightly less readable than a complete sentence.

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 one-parameter, read-only lookup with no output schema, the description carries enough: it tells the agent what the response will cover and that results are grounded in the index. Only minor gaps remain (input formatting, behavior on unknown standards).

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 single 'standard' parameter has no format guidance. The description partially compensates by giving real example values (AS9100D, NADCAP, ECSS, ISO 9001, MIL-STD), which helps an agent form a valid input, but says nothing about case sensitivity or whether exact strings are required.

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 clearly states the resource (certification standards) and enumerates the exact content returned: what it certifies, why buyers care, requirements, and claiming suppliers. Concrete examples (AS9100D, NADCAP, ISO 9001) pin down the domain. It implicitly separates itself from siblings like search_suppliers by covering the standard itself, though it never names those alternatives.

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?

Usage is implied rather than stated: an agent can infer this is for understanding a standard's meaning and relevance. There is no explicit when-to-use versus search_parts or get_supplier, and no guidance on prerequisites or input normalization.

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