in_app_purchase_contents_get_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 only that this is a GET. It does not state whether authorization is required, whether the resource may be absent (404 behavior), or any read-only/pagination traits.

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?

The single line duplicates the exact same string twice, adding no information in either instance. It is short but entirely wasteful rather than economical.

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 GET-by-id tool with no output schema, the description should at minimum identify what the returned resource represents. It leaves the resource semantics and any caveats undocumented, which is inadequate even for a simple fetch.

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%, so the schema already documents id, include, and the fields_* projection params. The description adds zero semantic value beyond the schema, which makes the baseline 3 appropriate.

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 only echoes the HTTP verb and route path from the tool name ('GET /v1/inAppPurchaseContents/{id}'), restated verbatim in parentheses. It never explains what an inAppPurchaseContent resource actually is, so an agent learns nothing beyond what the name already implies.

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?

There is no when-to-use guidance, no mention of alternatives, and no condition under which this instance fetch is preferred over the collection or relationship siblings. The description provides nothing that routes the agent.

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