confirm_group_enrollment

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

Annotations indicate readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=true. The description goes beyond annotations by explaining that it rechecks membership and live group details, permits only one enrollment request, and verifies membership. It also warns to 'Never retry an uncertain result automatically', which is critical for agents. No contradiction; it adds valuable behavioral context.

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, concise and front-loaded. The first sentence sets purpose and prerequisites, the second adds safety and non-retry guidance. No unnecessary words.

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 two-parameter tool with a simple action, the description covers prerequisites, behavior, and warning. It doesn't describe return values, but no output schema exists, so that is acceptable. It could mention what happens if the token is expired or already used, but the 'never retry' hint covers the main edge case. Overall sufficient.

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 explain parameters. It mentions 'confirmationToken' implicitly through 'confirmation token', and 'confirmed' is implied by 'explicitly approves' and the const true. However, it does not explicitly state the meaning of each parameter or constraints like minLength. Baseline is 3 for no coverage, and description partially compensates.

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?

Description clearly identifies the action (joining a group), the target (exact group in an unexpired preview), and the required condition (after student approves). It distinguishes from prepare_group_enrollment, which likely prepares the enrollment; this confirms it. Purpose is specific and unambiguous.

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?

Describes when to use: after student explicitly approves, in an unexpired preview, with a confirmation token. It does not explicitly mention alternatives but the phrase 'rechecks own membership and live group details, permits one enrollment request, verifies membership' implies it is the final confirmation step after prepare_group_enrollment, which is clear enough.

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