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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds that the result is an exhaustive enumeration ("every") with readiness state and area/task counts, which is useful context beyond the annotations; pagination behavior is not mentioned but the output schema carries the return shape.

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 sentences with no waste: what it returns is front-loaded, and the usage cue closes the description. Every clause carries information an agent can act on.

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 an output schema, annotations, and no parameters, the description covers nearly everything needed to call it correctly. The only minor gap is the absence of any note about result size or pagination for a potentially long full-list call.

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?

Zero parameters, so there is nothing to disambiguate and the baseline is 4. The description correctly implies no filtering arguments are needed, matching the empty schema.

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 gives a specific verb and resource ("Lists every FAA Airman Certification Standard") plus concrete examples (Private Pilot - Airplane, Instrument Rating - Airplane) and the fields returned. It implicitly separates itself from the detail-fetch sibling `airman_certification_standards` by framing itself as the enumeration step, though it never names that sibling explicitly.

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?

"Use this first to find the ACS a lesson is for" gives an explicit entry-point instruction that tells the agent to call this before detail retrieval. It stops short of naming alternatives or stating exclusions (e.g., when to prefer search_documents instead).

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