Cancel a booking (approval required)

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

No annotations are provided, so the description carries the full burden, and it discloses the critical behavioral gate: cancellation is blocked without a pre-issued approval linked to the exact same arguments. It adds value beyond the schema by naming request_approval as the issuer and stressing argument binding, though it says nothing about reversibility, side effects, or where an agent obtains the approval token.

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 short sentences, with the core action first and the hard precondition emphasized. Every clause earns its place; there is no boilerplate or padding.

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 destructive operation with zero annotations, no output schema, and a nested approval object, the description covers the essential precondition but omits return behavior, failure modes when the approval is missing/expired/mismatched, and whether the token is single-use. Adequate but with clear gaps given the tool's risk profile.

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. It does identify both parameters at a high level (bookingId as the target id, approval as a prior grant from request_approval), but it does not explain the nested token/approvedBy structure, token constraints, or why binding to exact arguments matters, leaving the nested-object semantics largely 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 ('Cancel an existing booking') and the keying mechanism ('by id'), so it is clearly distinct from create_booking and check_availability. It stops short of explicitly naming the sibling it is not, but the verb/resource pairing is 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?

Explicitly names the prerequisite tool ('REQUIRES a prior approval from request_approval') and the condition that the approval must be bound to these exact arguments, which is real when-to-use guidance an agent could not infer. It does not state when not to use the tool, so it falls short of the top band.

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