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

Annotations already declare readOnly, idempotent, and non-Destructive behavior, so the description does not need to restate that. It discloses that this tool returns languages, but adds no further behavioral context such as auth requirements, response shape, or failure modes. No contradiction with annotations exists.

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 sentences, short and front-loaded. The first sentence is somewhat redundant with the tool name, but the second sentence provides the essential functional detail with no verbose filler.

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 read-only getter,the description is minimally viable, but there is no output schema and no mention of what the returned 'languages' data looks like or how the optional account param affects results. It is sufficient for basic invocation but leaves gaps for an agent operating without additional API knowledge.

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%, so the description must compensate, but it only dupliciates 'order_item_kind' and does not add meaning for the optional 'account' parameter. The enum supplies possible order-item values, but account remains fully undocumented in both schema and description.

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?

Description uses a specific verb ('Returns') and identifies a concrete resource ('available languages') with an explicit scope ('for a given order item kind'). This distinguishes it from the many sibling getter tools in the same API, especially since the order-item-kind scope is unique.

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 scope 'for a given order item kind' implies when the tool is intended to be used, but there is no explicit guidance about when not to use it or which sibling tools might be preferable. It would benefit from naming alternatives such as other language/order-related lookups.

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