subscription_submissions_create_instance

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

No annotations are supplied, so the description carries the full behavioral burden, yet it only implies a write via the POST verb (already implied by the name). It says nothing about state prerequisites, side effects, permissions, idempotency, or the fact that this initiates App Store review.

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?

It is short and front-loads the endpoint, but the parenthetical repeats the exact same URL verbatim, which is pure waste; one clean sentence would have sufficed.

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 create/mutation operation with no annotations and no output schema, the description is thin: it never tells the agent what the call returns, what state the target subscription version must be in, or what happens on success. The OpenAPI pointer is the only substantive content.

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 body param is documented in the schema, so baseline 3 applies. The description's only parameter content is a pointer to components.schemas.SubscriptionSubmissionCreateRequest, which duplicates the schema's own description rather than adding format or envelope details.

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 gives a specific verb+resource (POST /v1/subscriptionSubmissions) so the operation is identifiable, but it merely restates the endpoint (twice) and never explains what a subscription submission is or how it differs from siblings like subscription_group_submissions_create_instance or in_app_purchase_submissions_create_instance.

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?

No guidance on when to use this create tool versus the many other submission-creation siblings, no prerequisites (e.g., the subscription version must be in a submit-ready state), and no conditions or exclusions stated.

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