add_product · MCP E-commerce Server MCP: Risk & Policy

WHAT IT DOES

What add_product does on MCP E-commerce Server

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

WHY IT NEEDS A POLICY

Why add_product needs a policy

This tool creates new records in the e-commerce database. Creation is a Write operation because it modifies data reversibly (products can be deleted or updated later). Severity is medium because misuse could create spurious inventory entries or pricing errors, but the blast radius is contained to product records and doesn't affect financial transactions, existing data deletion, or code execution.

From the tool's definition Tool name 'add_product' and description 'Create a new product' explicitly indicate data creation. Parameters include sku, name, description, price, and quantity—all reversible additions to the inventory database.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_product Rate-limited

add_product 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": {
    "add_product": {
      "limits": [
        {
          "counter": "add_product_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 E-commerce Server, so you can run agents against it safely.

FAQ

Questions about add_product

What does the add_product tool do? +

Create a new product with sku, name, (optional) description, price, and quantity. It is categorised as a Write tool in the MCP E-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 add_product? +

Register the MCP E-commerce Server MCP server in PolicyLayer and add a rule for add_product: 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 E-commerce Server. Nothing to install.

What risk level is add_product? +

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

Can I rate-limit add_product? +

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

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

add_product is provided by the MCP E-commerce Server MCP server (vanushya/mcp-example). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.