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

The description goes well beyond the readOnlyHint/idempotentHint annotations by disclosing pagination ('bounded page'), the effect of practice resets ('Honors practice resets'), and side-effect behavior ('Does not save, score, or consume a content preview'). This gives an agent a clear model of what happens during the call.

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 compact and front-loaded: the first sentence states the core action and resource, and the following two sentences add essential behavioral caveats. Every sentence earns its place with no redundant or filler content.

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 read-only, paginated history tool with a rich output schema and safety annotations, the description covers purpose, pagination, reset behavior, and side-effect exclusions. The main gap is the lack of parameter-level clarification, especially for the required subjectSlug, but the schema and self-evident naming partially cover this.

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%, so the description must compensate, but it only vaguely hints at pagination via 'bounded page'. It does not explain subjectSlug, cursor, or limit semantics, and no parameter names appear in the description. The agent must infer most parameter meaning from the schema alone.

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 verb ('Reads') and the resource ('bounded page of your saved self-study MCQ answers with current question explanations'). It differentiates from siblings by emphasizing read-only retrieval of saved answers and noting it does not save or score, which separates it from check_practice_answer and submit_practice_answer.

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 intended use case, reviewing past self-study MCQ answers, is implied by the title and first sentence, but no explicit alternative or when-not-to-use guidance is given. The statement 'Does not save, score, or consume a content preview' clarifies exclusions but does not name sibling tools or conditions for choosing this one.

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