vtex_create_coupon · MCP VTEX Server MCP: Risk & Policy

WHAT IT DOES

What vtex_create_coupon does on MCP VTEX Server

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

WHY IT NEEDS A POLICY

Why vtex_create_coupon needs a policy

Creating coupons is a reversible write operation—new coupons can be edited or archived (as evidenced by sibling tool 'vtex_archive_coupon'). While coupons affect business logic and customer-facing promotions, they don't directly move money or permanently delete data.

From the tool's definition Tool name 'vtex_create_coupon' and description 'Create a new coupon' indicate data creation. This is a write operation that modifies the promotion/coupon database by adding a new coupon record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vtex_create_coupon Rate-limited

vtex_create_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": {
    "vtex_create_coupon": {
      "limits": [
        {
          "counter": "vtex_create_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 VTEX Server, so you can run agents against it safely.

FAQ

Questions about vtex_create_coupon

What does the vtex_create_coupon tool do? +

Create a new coupon. It is categorised as a Write tool in the MCP VTEX Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on vtex_create_coupon? +

Register the MCP VTEX Server MCP server in PolicyLayer and add a rule for vtex_create_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 VTEX Server. Nothing to install.

What risk level is vtex_create_coupon? +

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

Can I rate-limit vtex_create_coupon? +

Yes. Add a rate_limit block to the vtex_create_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 vtex_create_coupon completely? +

Set action: deny in the PolicyLayer policy for vtex_create_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 vtex_create_coupon? +

vtex_create_coupon is provided by the MCP VTEX Server MCP server (leosepulveda/mcp-vtex). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.