Cancel Reservation

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

Annotations already flag destructiveHint=true and idempotentHint=false, but the description adds context annotations cannot carry: the cancellation is visible to the instructor, and the operation is irreversible with a mandatory two-call glow (dry-run then confirm=true). It still doesn't say what happens to the slot afterwards (released to others?) or whether cancellations can be disputed.

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?

Four short sentences, front-loaded with the action and its social consequence, with the irreversible/confirm warning bracketed at the end. No filler, though the bracketed warning partially duplicates the schema's confirm description.

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 an irreversible three-parameter mutation with no output schema, the definition covers who is affected, how to get the ID, and the safety procedure. The remaining gap is the post-call state (what a successful cancellation returns or whether the slot frees up), which the agent can infer but is not told.

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 100% and already documents confirm as a dry-run gate and event_id as a numeric string from list_calendar_events or list_my_reservations. The description restates the confirm workflow operationally but adds no syntax or constraint detail beyond the schema, so baseline 3 applies.

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 ('Cancel an appointment slot you booked') with the personal scope made explicit, so it reads clearly as the counterpart to reserve_appointment_slot. It does not distinguish itself from the nearby sibling delete_calendar_event, which is a plausible source of confusion for an agent.

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?

Usage is implied rather than stated: the description tells the agent to source event_id from list_my_reservations, which effectively points at the reserve/list workflow. It gives no explicit when-not-to-use guidance, and never rules out delete_calendar_event or update_calendar_event for the same underlying event.

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