app_store_version_localizations__create

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

Annotations indicate a non-read-only, non-idempotent operation, and the description is consistent. However, it adds no additional behavioral context like prerequisites, side effects, permissions, or expected response. It mostly restates the operation's purpose without disclosing hidden behaviors.

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, front-loaded with the verb and resource, and includes the endpoint. Every word earns its place; no fluff 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?

The tool involves a nested JSON:API structure with required relationships (appStoreVersion), but the description does not mention the need to supply a relationship ID or what response to expect. With no output schema, this is a significant gap for an agent to use the tool correctly.

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% (the body parameter has a description). The description enumerates locale-related fields (description, keywords, whatsNew, promotionalText), which adds mild semantic value, but the schema already defines all parameters, types, and constraints.

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 clearly states the action ('Add a new language (locale)') and the resource ('to an App Store version'), listing the fields included (description, keywords, what's new, promotional text). This distinguishes it from sibling operations like update, delete, or list.

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 when to use it (when adding a new localization) but does not explicitly mention alternatives or exclusions, such as using the update tool for existing localizations. It provides clear context but lacks when-not guidance.

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