cart_add_coupons · MCP Dynamics 365 Commerce Server MCP

WHAT IT DOES

What cart_add_coupons does on MCP Dynamics 365 Commerce Server

AI agents use cart_add_coupons to create or update resources in MCP Dynamics 365 Commerce Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Dynamics 365 Commerce Server environment.

WHY IT NEEDS A POLICY

Why cart_add_coupons needs a policy

This tool creates or modifies cart data by adding coupons, which is a reversible operation. It does not execute arbitrary code, delete data, or move money. While it could affect pricing calculations and order totals, the primary action is modifying cart contents, placing it in the Write category.

From the tool's definition Tool name 'cart_add_coupons' and description 'Add coupons to cart' indicate a create/modify operation on cart data. The action adds promotional coupons to a customer's cart, which modifies the cart state and potentially reduces the total price.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cart_add_coupons Rate-limited

cart_add_coupons 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": {
    "cart_add_coupons": {
      "limits": [
        {
          "counter": "cart_add_coupons_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Dynamics 365 Commerce Server, so you can run agents against it safely.

FAQ

Questions about cart_add_coupons

What does the cart_add_coupons tool do? +

Add coupons to cart. It is categorised as a Write tool in the MCP Dynamics 365 Commerce 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 cart_add_coupons? +

Register the MCP Dynamics 365 Commerce Server MCP server in PolicyLayer and add a rule for cart_add_coupons: 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 Dynamics 365 Commerce Server. Nothing to install.

What risk level is cart_add_coupons? +

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

Can I rate-limit cart_add_coupons? +

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

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

cart_add_coupons is provided by the MCP Dynamics 365 Commerce Server MCP server (jiantmo/mcp-commerce). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.