in_app_purchase_localizations_v2_update_instance

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

With no annotations, the description carries the full burden, yet it only signals a mutation via the PATCH verb. It does not state permissions required, whether the update is partial vs full-replace, whether changes are reversible, or what happens to unspecified fields.

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 and front-loaded, but the route is duplicated verbatim in parentheses and the second sentence only redirects to an external OpenAPI schema, so much of the text does not earn its place.

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 mutation tool with a nested JSON:API body, no annotations, and no output schema, the description does far too little: it neither enumerates the patchable fields nor explains the envelope beyond pointing at an external schema name.

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%, so both the id and body parameters are already documented in the schema, and the description merely repeats the same OpenAPI schema pointer. Baseline 3 applies since the description adds no extra meaning over structured data.

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 is essentially the HTTP route 'PATCH /v2/inAppPurchaseLocalizations/{id}' repeated twice in parentheses. It implies a mutation of an in-app purchase localization but never states in plain language what the tool does or how it differs from the v1 sibling in_app_purchase_localizations_update_instance. This is close to tautology on the route/name.

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 guidance on when to use this versus the v1 update tool or the get/delete siblings, no prerequisites, and no note on which fields are intended to be patched. The agent is left to infer everything from the endpoint name.

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