subscriptions.create

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

No annotations provided and description discloses no behavioral traits: omits whether creation triggers immediate billing, idempotency semantics, required resource relationships, or mutation side effects.

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?

Single sentence avoids bloat, but inappropriate brevity for an 8-parameter nested schema; every word earns its place but there aren't enough of them to support the complexity.

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?

Woefully incomplete for a financial creation tool with no output schema and zero annotations; missing critical context about billing cycle behavior, currency constraints, and retry logic that an agent needs to invoke safely.

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 has 0% description coverage with 8 complex parameters including nested interval objects; description compensates with nothing—no valid values, formats (ISO 4217 for currency?), or semantics for billingCycleTimestamp, interval unit types, or optional versus required nuances.

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?

States verb (Create) and resource (Ryft subscription) but remains vague about the subscription model—fails to clarify this sets up recurring billing with intervals versus one-time payments (paymentSessions) or distinguish from subscriptions.update.

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?

Zero guidance on when to use versus subscriptions.update, prerequisites (e.g., customer must exist first), or required payment method attachment timing.

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