fulfill_order

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

With no annotations, the description carries the full behavioral burden, and it does disclose the critical side effect ('releases escrow payout'), which is genuinely valuable for a mutation tool. However, it says nothing about permissions, idempotency/duplicate-submission behavior, reversibility of the payout release, or error handling.

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 with no filler; the action and precondition are front-loaded and the side effect closes the statement. 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?

Covers the essentials for a mutation tool with no output schema: action, precondition, and financial side effect. It leaves gaps on permission requirements and the digital_code fulfillment path, and its phrasing ('submit carrier and tracking number') implies carrier is required when the schema marks it optional.

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 100%, so the schema already documents all five parameters, giving a baseline of 3. The description reinforces carrier/tracking and adds ordering context, but it does not clarify the optional carrier field, the fulfillment_type default, or the notes parameter.

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 action (submit carrier/tracking) against a specific resource (a paid, shipped order), which is unambiguous and easy to distinguish from inventory/pricing siblings. It does not name any sibling, but none of the siblings overlap enough to require routing guidance.

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?

Provides a clear usage precondition: use it 'once an order has been paid and shipped,' which tells the agent when this tool is applicable. It stops short of naming alternatives or exclusions (e.g., what to do if the order is unpaid), so it falls just below the top band.

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