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

With no annotations, the description carries the full burden and delivers real behavioral context: the contact details become PUBLIC on the listing, the failure mode is a bare FAILED_PRECONDITION, and the source is Play Console's bundle with a not-yet-live-verified caveat. It does not say whether unspecified settings are preserved or cleared on a call, nor whether repeated calls are idempotent, which matters for a settings mutator.

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?

Purpose is front-loaded in the first clause, and the gating consequence follows immediately. The second sentence is slightly padded ("with a bare FAILED_PRECONDITION and Play Console's own Send-for-review button stays greyed out") but every part still informs the agent's decision to call.

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 an 8-parameter mutation tool with no annotations and no output schema, the description covers purpose, triggering condition, a strong public-visibility warning, and a provenance caveat. The remaining gap is the semantics of an update: whether omitted fields are left untouched, and what a successful call returns.

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 all eight parameters, including the PUBLIC warning on contact_email and the enum-like category list. The description reinforces that contact details are public but adds nothing about developer_id, play_app_id, google_account_email, or notification_message beyond what the schema states, so the baseline 3 applies.

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?

Specific verb (Set) plus specific resource (the app's store category and public contact details), with the affected fields named. It is clearly separable from sibling tools like update_store_listing, update_privacy_policy, and update_content_rating, which touch different surfaces.

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?

It states when this tool is needed: it is a dashboard setup task that gates send_app_for_review, and without it review submission fails with FAILED_PRECONDITION. That gives a clear trigger condition. It stops short of explicit exclusions, e.g. how this differs from update_store_listing or update_privacy_policy when an agent is deciding between the several update_* declaration tools.

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