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

Discloses the key two-step behavior: the correct answer is withheld by default, and a follow-up call with question_id and reveal_answer: true returns the correct choice and per-choice explanations. Adds the meaningful caveat that questions are not actual FAA test questions, going beyond the readOnly/idempotent annotations.

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?

Four focused sentences, front-loaded with the return value and the central withholding behavior, then the follow-up call, usage triggers, and optional topic scoping. No filler or repetition.

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?

Given no output schema, the description names the main return fields (answer choices, topic, question_id, pplfree.com link) and explains the reveal flow. Usage guidance is explicit and the two-step invocation behavior is fully specified.

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 documentation covers all four parameters, so the baseline is 3. The description reinforces the question_id/reveal_answer workflow but adds little new parameter syntax or formatting beyond what the schema already states.

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 ('Return') and resource: private-pilot practice questions in FAA style, not actual FAA test items. Mentions key contents (answer choices, topic, question_id, link), and by framing this as practice questions for this course it is clearly distinct from siblings such as search_faa_knowledge.

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?

Explicitly enumerates trigger scenarios: user wants to be quizzed, asks for practice/test questions, wants to check understanding, or is preparing for the FAA private-pilot knowledge test. It does not name alternative sibling tools or give when-not-to-use conditions, so it stops just short of a 5.

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