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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description still adds real value: the ownership constraint, the 'only future reservations' restriction, the login requirement, and the side effect that Zacatrus sends the cancellation email.

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?

Front-loaded with the action and scope, followed by the booking_id source, confirmation requirement, side effect, and auth precondition. Every sentence carries distinct operational information with no filler.

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 needed and annotations covering the safety profile, the description supplies everything else an agent needs: prerequisites (login), the id source, the confirmation step, and the outcome (cancellation email). Nothing material is missing for a 2-parameter mutation tool.

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%, so both parameters (booking_id and country) are already documented in the schema, including the booking_id source and the country enum semantics. The description only restates that booking_id comes from my_bookings, adding no syntax or format detail beyond the schema, so the 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 ('Cancela una reserva de mesa en la ludoteca') and narrows the scope to the client's own, not-yet-passed reservations. This cleanly distinguishes it from siblings such as my_bookings (which reads) and ludoteca_slots (which lists availability).

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?

Explicitly tells the agent where to get booking_id ('Obtén el booking_id con my_bookings') and mandates asking the customer for confirmation before cancelling. It leaves no ambiguity about the workflow or the prerequisite login state.

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