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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is known. The description adds valuable behavioral context: the requirement for a Word Orb key, quota impact, and variability of content availability. This goes beyond annotations and helps the agent anticipate auth needs and inconsistent results.

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, with the primary purpose stated first and the additional constraints (key, quota, variability) in a short follow-up. No wasted words; every sentence earns its place.

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 simple retrieval tool with two parameters and no output schema, the description covers purpose, authentication, quota, and content variability. It does not describe the response format or pagination, but these are minor given the tool's simplicity and the annotations' coverage of safety.

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 for parameter meaning. It does tie 'day' and 'track' to the lesson context, but does not explain data types, formats, or allowable values. This provides basic meaning but leaves the agent to infer specifics, so a 3 is appropriate.

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 action ('Retrieve') and the resource ('quiz questions') scoped by lesson day and track. It distinguishes the tool's purpose from siblings like get_lesson, but does not explicitly name any alternative, so it falls just short of a 5.

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?

No guidance on when to use this tool versus alternatives. It implies usage for retrieving quiz questions, but there is no mention of when not to use it, prerequisites (beyond the key), or how it relates to get_lesson or other siblings. The key/quota note is contextual but not a usage guideline.

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