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

With no annotations, the description must carry the behavioral burden, and it discloses a genuine policy: acceptance happens automatically 3 days after delivery if no answer is given. It also states the precondition of a prior purchase. It stops short of stating whether an explicit approval can be undone, which is the key residual risk for an approval action.

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 action stated first and the time-based default second. Nothing wasteful, though the 'Kiosq guarantee' lead-in slightly delays the actionable content.

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 action with no output schema, the definition covers the action, the precondition, and the automatic fallback behavior. Only the reversibility question is left open.

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?

The schema has one parameter at 100% coverage, so the baseline is 3. The description implies order_id refers to the service order being accepted but adds no format or lookup guidance beyond the schema's 'UUID' note.

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: 'approve the delivered result of a service you ordered'. That distinguishes it from siblings like request_revision, request_refund and deliver_service. The prefix 'Kiosq guarantee:' is platform jargon that adds no meaning, but the operative clause is clear.

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?

'requires buy' gives one usage precondition, which is useful context. However, it never says when NOT to use it, e.g. to use request_revision or request_refund instead if the delivery is unsatisfactory, even though those siblings exist.

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