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

Annotations declare readOnlyHint=false and destructiveHint=false, and the description adds real context beyond them: the page is created as a draft, it inherits the live version's media, keywords must already exist in the approved keyword field, and Apple only shows it in search after approval. It still doesn't say what the call returns (page id, draft state) or what happens on duplicate name.

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 core facts are front-loaded, but the opening is a long run-on sentence with parenthetical nesting, and the trailing fragments 'Growth. Free.' add taxonomy noise without operational value.

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 no output schema and low schema coverage, the description does cover draft semantics, media seeding, keyword constraints and the downstream review step. Gaps remain: the non-existent 'ppid' param confuses the interface, and default behaviors (locale default, what the response contains, what happens to the live page) are unstated.

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 only 29% across 7 params, so the description must compensate; it does add meaning for keywords (approved-field restriction), screenshots (new captioned screenshots seeded from live media) and the App Store search effect. But name, appId and locale are left entirely to the sparse schema, and it references a 'ppid' parameter that does not appear in the schema at all, which is a mismatch rather than added clarity.

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 and resource ('Make a custom product page as a draft') plus the scoping intent ('for one audience or search'), so the agent knows exactly what is produced. It does not explicitly name the nearby siblings (app_cpp_list, app_metadata_stage), leaving the differentiation implicit.

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 phrase 'for one audience or search' and the keyword constraint ('only words already in the approved keyword field can be assigned') imply when this is the right tool, and the note that the founder submits for review in App Store Connect sets expectations after the call. However, there is no explicit when-not guidance or named alternative (e.g., app_cpp_list for existing pages, app_metadata_stage for metadata edits).

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