Create subscription group

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

Annotations (readOnlyHint=false) already indicate this is a write operation, and the description's 'create' aligns. However, the description adds no extra behavioral context such as side effects, permissions, or return values. It is not contradictory, but also not enriching beyond the obvious mutation.

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 two sentences: the first defines the tool's purpose, the second gives a direct follow-up action. Every word earns its place; it is front-loaded with the core action and resource, with no unnecessary detail.

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 simple create operation with two fully documented required parameters and no output schema, the description is sufficient. It explains what a subscription group is and how to proceed, though it could mention what is returned. This is a minor gap, but overall it is complete for the tool's simplicity.

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?

The input schema provides full descriptions for both parameters (appId and referenceName), covering 100% of the schema. The tool description itself does not add any additional meaning about the parameters, so it stays at the baseline for high schema coverage.

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 tool creates a subscription group, explicitly defines it as a container for auto-renewable subscriptions, and differentiates from the sibling tool create-subscription by instructing to use that next. This provides a specific verb and resource, making the purpose unambiguous.

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 gives a clear workflow: create the group first, then add subscriptions via create-subscription. This implies the appropriate usage context and distinguishes from alternatives, though it does not explicitly state when not to use the tool or mention exclusions.

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