Create routing app coverage for an App Store version by specifying the file name and size.
Create a routing app coverage. [POST /v1/routingAppCoverages]
| Name | Required | Description | Default |
|---|---|---|---|
| body | Yes | JSON:API request body (Apple schema: RoutingAppCoverageCreateRequest). |
Changes observed during successful MCP inspections.
v1.3.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate a non-read, non-idempotent, non-destructive operation. The description adds 'Create' which matches, but does not disclose any additional behavioral traits like required permissions or side effects beyond what annotations imply.
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 description is a single sentence plus endpoint reference, which is highly concise and front-loaded with the key action.
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?
Given the complexity of the input schema (nested objects with required attributes and relationships) and lack of output schema, the description is too minimal. It does not explain what a routing app coverage is or the implications of creation.
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 100% per context, so the baseline is 3. The description adds a brief note about the request body type but does not explain the meaning of individual nested fields (e.g., fileName, fileSize, appStoreVersion).
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 clearly states the action 'Create' and the resource 'routing app coverage', and includes the endpoint. This distinguishes it from sibling tools like get, update, and delete.
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 provides no guidance on when to use this tool versus alternatives, such as when a routing app coverage should be created or what prerequisites exist.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.