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

Annotations already establish this as a read-only, idempotent, non-destructive, open-world operation, so the safety profile is covered. The description adds the possible status values, but it does not mention authentication requirements, what happens for an unknown order, or any rate limits.

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?

A single short sentence with the key return states front-loaded. There is no filler or redundancy.

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 simple one-parameter read tool with rich annotations, the description is close to adequate, but it omits what happens when the order is not found and how the order_id is obtained. Those gaps matter for correct invocation.

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 0% and the single required parameter order_id is left unexplained in the description. 'Order from buy_pack' hints at provenance, but the description does not clarify the integer ID format, where to obtain it, or how it behaves in lookups.

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 names the resource (order status) and explicitly ties it to the sibling operation buy_pack, with the possible return states (pending or paid). It stops short of fully differentiating from other order-adjacent tools, but the verb+resource is clear enough to select it.

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?

Mentioning 'from buy_pack' implies this is a follow-up check after purchasing a pack, giving some usage context. However, it does not state prerequisites, when not to use it, or which sibling to use for related order tasks.

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