create_refund

Issue a refund to a customer

SERVERStripe SOURCE@modelcontextprotocol/server-stripe

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade D, identity verified Pull the record →

This record as markdown: /tools/stripe/create-refund.md

WHAT IT DOES

What create_refund does on Stripe

AI agents use create_refund to commit financial operations through Stripe, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why create_refund is rated Critical

Refunds commit financial obligations and reverse monetary transactions. An AI agent misusing this tool could initiate unauthorized refunds, causing direct financial loss. The sibling tools (cancel_subscription, create_invoice, create_payment_link, etc.) confirm this is a payment processing context where financial impact is high.

From the tool's definition Tool name 'create_refund' and description 'Issue a refund to a customer' directly indicate the ability to move money back to a customer account, which is a financial operation.

Risk signalsSends money back to customers

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_refund safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Stripe, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_refund, this is the rule to start with:

create_refund Approval-gated

Any call to create_refund is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_refund": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Stripe, apply this rule, and every create_refund call is checked against it from then on.

FAQ

Questions about create_refund

What does the create_refund tool do? +

Issue a refund to a customer. It is categorised as a Financial tool in the Stripe MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on create_refund? +

Register the Stripe MCP server in PolicyLayer and add a rule for create_refund: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Stripe. Nothing to install.

What risk level is create_refund? +

create_refund is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit create_refund? +

Yes. Add a rate_limit block to the create_refund rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_refund completely? +

Set action: deny in the PolicyLayer policy for create_refund. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_refund? +

create_refund is provided by the Stripe MCP server (@modelcontextprotocol/server-stripe). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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