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

Annotations already declare the write, non-idempotent, non-destructive profile; the description adds the auth requirement and the fact that output includes a QR code and ties play results to a specific class/group. It stops short of saying whether repeat calls mint new distinct links or how the link is returned.

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: the core action and effect first, the auth prerequisite second. Slight redundancy in 'results ... can be seen on their own', but nothing is padded out.

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 one-parameter tool with no output schema this covers the essentials; however, it never clarifies what the caller gets back (URL, QR image, or both) or how the implicit class/group scoping is determined, which are the main open questions before invoking it.

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 coverage is 100% and the single `quiz` parameter is documented as 'id or link', so the description only adds the constraint that the quiz be one 'the user made'. It mentions 'one class or group' yet no such parameter exists in the schema, leaving that scoping unexplained.

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 and resource ('makes a link to a quiz ... with a QR code') plus the downstream effect (per-class results tracking), which is more than the title alone. It never names a sibling or explicitly contrasts with make_quiz/quiz_results, so it falls short of 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?

It gives one useful precondition ('Needs the user logged in to Tjaz') but no guidance on when to choose this over make_quiz or quiz_results, and no when-not case. Usage must be inferred from the scenario described.

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