agent_checkout_prepare

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

No annotations are provided, so the description must disclose behavioral traits itself. It states that it creates a Stripe Checkout Session and returns a URL, but it does not mention side effects (e.g., that a Stripe session is created and may expire), required authorization, idempotency, or behavior on invalid quote_id. For an external side-effecting operation, this is minimal transparency.

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, front-loaded sentence that packs the action, target, phase, and return value with no fluff. Every word earns its place.

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 tool with one parameter, no output schema, and no annotations, the description gives the basic purpose and return, but it lacks workflow context (what must happen before/after), error conditions, and any constraints on the quote. It is adequate but not complete for an agent to confidently invoke it in a multi-step checkout flow.

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?

With 0% schema description coverage and a single required parameter, the description must clarify quote_id's meaning. It does: 'for quote' connects quote_id to the quote entity, and 'Phase 2' implies the quote is already set up. However, it does not explain the ID format, requirements (existing quote, status), or how the parameter relates to session creation beyond that. This adds some meaning but is still under-specified.

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 uses a specific verb 'Create' with a specific resource 'Stripe Checkout Session' for a quote, and names the return value. It clearly distinguishes from siblings like agent_checkout_quote and agent_checkout_status by naming the action and phase (Phase 2), 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 only hints at usage context via 'Phase 2' and 'for quote', implying it should be used after a quote exists and before payment/fulfillment. However, it does not explicitly state when to use this tool versus the sibling checkout tools, nor does it mention prerequisites or exclusions. This is implied usage, not explicit guidance.

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