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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds useful return-shape context (fulfillment status, fulfillment order status, fulfill-at date) but says nothing about pagination, limits, or behavior when the origin order has no fulfillments.

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, front-loaded with what the tool returns; nothing is padded. The raw GET path is of marginal value but is not harmful.

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?

There is no output schema, so the description's enumeration of returned fields (fulfillment status, fulfillment order status, fulfill-at date) contributes real information. For a read-only two-parameter lookup with guaranteed schema docs, this is close to sufficient, with only sibling routing guidance missing.

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%, with both IDs fully documented including gid:// formats, so the schema does the heavy lifting. The description adds no parameter meaning, and its path template uses camelCase ({customerId}/{subscriptionId}) while the schema uses snake_case, a minor inconsistency an agent must map mentally.

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 uses a specific resource ("fulfillment status and the fulfillment orders ... of a subscription's origin order") rather than restating the name. It is distinguishable from awtomic_get_origin_order by scope (fulfillments only), though it never names that 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?

Usage is only implied: the description says what data it returns, so an agent can infer it should call this when fulfillment information is needed. There is no explicit when-to-use/when-not guidance and no mention of the closely related awtomic_get_origin_order sibling.

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