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

Annotations already declare readOnly=true, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds useful semantics, notably that source=null means the quiz was picked by terms/card_ids and that origin distinguishes app from chat, but it says nothing about paging, default result size, or what happens at the limit boundary.

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?

One front-loaded sentence that states the resource and ordering before the field list, with no filler. The dense field enumeration is long but every item conveys return-shape information.

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 carries return-value burden and does so thoroughly by enumerating id, type, source, tag, mode, score/total, size, origin and timestamps. However, it omits the limit parameter's behavior, leaving a gap for a listing tool that returns a bounded set.

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?

The single parameter limit has 0% schema description coverage and is not mentioned anywhere in the description, including no default of 10, no maximum, and no effect on ordering. With coverage at 0% the description was expected to compensate and it does not address the parameter at all.

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 clear resource (recent quizzes) scoped to the active profile with an explicit ordering (newest first), which an agent can act on. It does not differentiate itself from related siblings such as quizzes or quiz_result, so the boundary must be inferred from the 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 no when-to-use guidance, no mention of when-not to use it, and never names an alternative like quizzes or quiz_result. The agent must guess that 'recent' listing is the distinguishing purpose.

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