apply_coupon · Mcp Wingstop MCP: Risk & Policy

WHAT IT DOES

What apply_coupon does on Mcp Wingstop

AI agents use apply_coupon to create or update resources in Mcp Wingstop — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Wingstop environment.

WHY IT NEEDS A POLICY

Why apply_coupon needs a policy

Applying a coupon modifies the current order by adding a discount code. This is a reversible write operation (the coupon could be removed), not financial by itself since it doesn't move money — it only adjusts pricing before checkout. Misuse could result in unauthorized discount application or order manipulation.

From the tool's definition Apply a coupon or promo code to the current order for a discount

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

apply_coupon Rate-limited

apply_coupon stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "apply_coupon": {
      "limits": [
        {
          "counter": "apply_coupon_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Wingstop, so you can run agents against it safely.

FAQ

Questions about apply_coupon

What does the apply_coupon tool do? +

Apply a coupon or promo code to the current order for a discount. It is categorised as a Write tool in the Mcp Wingstop MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on apply_coupon? +

Register the Mcp Wingstop MCP server in PolicyLayer and add a rule for apply_coupon: 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 Mcp Wingstop. Nothing to install.

What risk level is apply_coupon? +

apply_coupon is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit apply_coupon? +

Yes. Add a rate_limit block to the apply_coupon 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 apply_coupon completely? +

Set action: deny in the PolicyLayer policy for apply_coupon. 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 apply_coupon? +

apply_coupon is provided by the Mcp Wingstop MCP server (markswendsen-code/mcp-wingstop). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.