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

With no annotations, the description carries the burden. It discloses that the token is consumed once, that the exact recorded change is dispatched, and that replaying on uncertainty is forbidden. It could go further by stating what happens on duplicate or expired refs, but the core safety-relevant behavior is covered.

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, zero filler. The main action is front-loaded, and the important retry caveat and fallback are given immediately after. Every sentence 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 simple one-parameter mutation with no annotations and no output schema, the description covers the main purpose, the one-time behavior, and the safety fallback. It could improve by explaining that bid_prepare must have been called first to generate the approval_ref, but that is reasonably inferred from the name and sibling set.

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 coverage is 0%, but the description gives the single parameter meaningful role semantics: it is a bid approval_ref that is created elsewhere and consumed by this action. The schema provides format/length constraints; the description supplies the operational meaning.

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?

The description names a concrete action ('consume one bid approval_ref') and a concrete result ('dispatch the exact recorded TikTok ad-group change once'). It clearly distinguishes this confirm step from preparation and from querying operations_get, and the idempotent 'once' caveat adds useful precision.

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?

It explicitly tells the agent not to replay uncertain results and to use operations_get on the original route insteadainer. It does not explicitly mention the counterpart bid_prepare or define when the approval_ref is obtained, but the prerequisite is strongly implied by 'bid approval_ref' and the sibling list.

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