Open a Stripe payment for one quote and get the payment URL

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

Discloses the side effect of opening a payment, warns that the amount is read server-side and cannot be changed, and clarifies that card authorization and payment completion are separate steps. The annotations already indicate non-readOnly and non-idempotent behavior, and the description adds useful caveats without contradicting them.

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 somewhat lengthy with all-caps warnings, but each block conveys a distinct operational caveat. It remains focused and does not include irrelevant information.

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 there is no output schema, the description adequately names the return values (hosted payment URL and payment ID), explains the follow-up step (poll dfx_payment_status), and notes that this build only handles Stripe TEST payments. This is enough for an agent to use the tool correctly.

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 schema already covers both parameters, and the description adds meaning by explaining quote_id's source and account_key's fallback purpose. This goes beyond simple type descriptions, though it does not need to elaborate further.

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?

Clearly states the tool opens a Stripe payment for exactly one quote, using the provided account key, and returns a hosted payment URL and payment ID. This distinguishes it from sibling tools like dfx_payment_status and open_dfx_account.

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?

Provides explicit context for when to use it: quote_id comes from a PAYMENT_REQUIRED reply, and account_key is only needed if the MCP client cannot send the X-DFX-Account header. It also points to dfx_payment_status for polling, though it does not spell out every when-not scenario.

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