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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so safety is covered. The description adds the underlying endpoint (GET /vendor/orders/{shopifyId}), confirming it is a direct remote read keyed on the Shopify id. It says nothing about not-found handling or what the payload contains, which matters more given openWorldHint.

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?

One compact sentence plus an endpoint reference; nothing is padded. The elliptical opening ("One order by its Shopify order id") is slightly clipped, but the key constraint leads and the route follows.

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 is the only place an agent could learn what a successful response looks like, and it does not say. For a single-param, fully documented, read-only getter this is adequate but incomplete.

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% and the single parameter is already described in the schema as the `shopifyId` from `smartrr_list_orders`. The description restates that mapping without adding format, coercion, or example details, so the baseline 3 applies.

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+resource+cardinality: fetch exactly one order, keyed by Shopify order id. It also names the sibling (`smartrr_list_orders`) that supplies the id, so an agent can immediately distinguish this from the list 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 implies the retrieval workflow — get `shopifyId` from `smartrr_list_orders`, then call this — which is clear usage context. It does not state exclusions (e.g., use `smartrr_get_subscription_orders` when you want orders tied to a subscription rather than a bare order lookup), so it falls short of a 5.

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