in_app_purchase_localizations_create_instance

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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses nothing beyond the raw endpoint. There is no statement of auth requirements, side effects of creating a localization, idempotency, or validation behavior — all critical for a mutation tool.

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?

It is short, but the parenthetical duplication "(POST /v1/inAppPurchaseLocalizations)" is pure waste, and the description is not front-loaded with purpose — it leads with the method/path rather than what the tool does. Under-specification rather than true conciseness.

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 create-mutation tool with no annotations and no output schema, an agent needs to know what is created, required auth, and the effect of success. The description only defers to an external OpenAPI schema, leaving the agent without enough to safely invoke it.

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?

There is a single body parameter and schema_description_coverage is 100%, so the schema already documents the shape. The description adds only a pointer to components.schemas.InAppPurchaseLocalizationCreateRequest, which is the same reference the schema description already carries. Baseline 3 applies since the schema does the heavy lifting.

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 restates the HTTP verb and path ("POST /v1/inAppPurchaseLocalizations") which is essentially a tautology of the tool name. It does not explain what an InAppPurchaseLocalization is, what creating one accomplishes, or how it differs from the sibling in_app_purchase_localizations_v2_create_instance. The verb+resource can only be inferred from the name, not the text.

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?

No when-to-use guidance, no prerequisites, and no mention of alternatives. With two near-identical siblings (v1 vs v2 create_instance) plus update/get/delete variants, the description offers nothing to help an agent choose this tool or distinguish versions.

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