Create In App Product

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

With no annotations, the description carries the full behavioral disclosure burden. It does disclose that this is a mutating operation and that it is disabled in read-only mode, which is useful. However, it does not mention side effects such as whether the created product is a draft requiring an edit/commit workflow, or what happens on validation failure.

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 short sentences with the core action front-loaded and a valuable operational caveat second. No filler, repetition, or unnecessary detail.

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 basics are covered: a simple schema, an output schema, and a clear create action. However, the nested product object is loosely typed with additionalProperties true, and the description does not explain required subfields, SKU uniqueness, or the relationship to edit/commit operations, leaving room for incorrect invocation.

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 baseline of 3 applies. The description itself adds no parameter-level detail, but the schema already describes package_name and gives example fields for the product body, which is adequate minimally.

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?

States a specific verb ('Create'), a clear resource ('in-app product'), and a scope ('catalog'). This distinguishes it from sibling operations like update_in_app_product, delete_in_app_product, and list_in_app_products without requiring the agent to inspect the schema.

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 gives no guidance on when to choose this tool over related creation tools like create_subscription, create_edit, or the one-time-product variants. The phrase 'Disabled in read-only mode' is an operational constraint rather than usage direction.

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