Fulfillment Tracking Events Create

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

Annotations already cover the safety profile (readOnlyHint=false, idempotentHint=false, destructiveHint=false, openWorldHint=true). The description adds genuinely useful non-annotation context — the required scope and API version — but says nothing about what side effects adding an event has (buyer notifications, status transitions, duplicate 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?

Four short, front-loaded lines with no filler; the action sentence comes first and the operational metadata follows. The HTTP/version lines are boilerplate but each carries actionable information.

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 3-parameter mutation with full schema coverage and no output schema, the description covers the essentials plus auth scope. It lacks any statement about the success response or event-limit behavior, which a write tool would ideally mention.

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 100%, so all three parameters are already documented, giving a baseline of 3. The description only implies parameter placement through the URL template; the 'event' payload's shape is left entirely to the schema's pointer to the API reference.

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?

"Add a tracking event to a fulfillment order" gives a specific verb and resource, and the HTTP endpoint path reinforces the resource hierarchy. It stops short of naming the sibling operations (tracking_events_update / tracking_events_delete), so an agent must infer that 'add' is the create variant.

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 description supplies a prerequisite (write_fulfillment_orders scope) but never states when to use this versus updating or deleting a tracking event, nor when an event should be recorded at all. Usage is implied by the verb rather than explained.

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