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

With no annotations, the description carries full burden; it usefully discloses the taker scope, the precondition, and the consequence that the order otherwise only leaves the book by expiring. It omits what happens to the RFQ thread/state after cancellation, whether it's reversible, and any auth/permission detail beyond 'your own'.

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 tight sentences, zero filler, with the scope and precondition front-loaded before the consequence. Every clause earns its place.

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 single-parameter mutation with no annotations or output schema, the description gives enough purpose, scope, timing, and consequence to invoke it correctly. The main gap is silent handling of the id parameter and post-cancellation state.

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?

One parameter ('id', UUID) with 0% schema description coverage, and the description never mentions it. The name cancel_rfq plus the '(scope: taker)' hint let an agent infer the id is the RFQ to cancel, but no explicit parameter meaning is added beyond the schema's format constraint.

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 (withdraw/cancel) and resource (RFQ) plus an ownership/scope qualifier '(scope: taker)' and a temporal precondition 'before a deal is agreed'. It is clearly distinct from create_rfq, get_rfq, and accept_proposal, though it does not name a sibling explicitly.

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?

The precondition 'before a deal is agreed' plus '(scope: taker)' tells the agent when the tool applies and to whom. The second sentence implicitly contrasts with the alternative behavior (letting the order expire), giving a reason to prefer cancellation, though no explicit tool alternative is named.

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