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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so safety behavior is covered. The description adds little beyond that, and 'the app_id parameter specified in the POST request' refers to the submission call rather than this invocation, which is potentially confusing since the actual parameter here is named 'id'.

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?

Three sentences with noticeable redundancy ('specified in a POST request' is effectively stated twice) and a return-value enumeration that duplicates the output schema. Front-loaded purpose is fine, but wording does not earn its keep.

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?

With an output schema present, listing returned fields is unnecessary, and the description omits the more valuable context: that the id originates from the corresponding submit task and expires after 30 days. Adequate for a simple fetch, but the key workflow linkage is missing.

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% and the single 'id' parameter is fully documented in the schema (UUID task identifier, 30-day validity). The description's reference to an 'app_id parameter in the POST request' does not match the 'id' parameter name and adds confusion rather than meaning, so it sits at the baseline.

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 states a concrete verb (provides/fetches) and resource (mobile application info: ID, icon, description, reviews count, rating, images), so the agent can identify it as an app-detail retrieval tool. It is not explicitly differentiated from the sibling get_dataforseo_app_google_app_info_fetch or the *_list_fetch tools, but the Apple/app-info scope is clear.

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 guidance on when to use this versus siblings, nor that it must be called after post_dataforseo_app_apple_app_info_submit to retrieve the queued task's results. The only hint that an id is required comes from the schema, not the description.

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