cart_add_charge · MCP Dynamics 365 Commerce Server MCP

WHAT IT DOES

What cart_add_charge does on MCP Dynamics 365 Commerce Server

AI agents use cart_add_charge 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_charge needs a policy

Adding a charge to a cart is a write operation that modifies cart state. It is reversible (charges can typically be removed), so it's Write rather than Destructive. While it involves financial amounts, it does not move money or commit financial obligations — it only stages a charge in a cart prior to checkout, so Financial does not apply. Misuse could lead to incorrect charges being applied to customer orders.

From the tool's definition 'Add charge to cart' — creates/modifies cart data by adding a financial charge entry

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cart_add_charge Rate-limited

cart_add_charge 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_charge": {
      "limits": [
        {
          "counter": "cart_add_charge_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_charge

What does the cart_add_charge tool do? +

Add charge 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_charge? +

Register the MCP Dynamics 365 Commerce Server MCP server in PolicyLayer and add a rule for cart_add_charge: 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_charge? +

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

Can I rate-limit cart_add_charge? +

Yes. Add a rate_limit block to the cart_add_charge 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_charge completely? +

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

cart_add_charge 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.