create_product · Rebillia MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_product does on Rebillia MCP Server

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

WHY IT NEEDS A POLICY

Why create_product needs a policy

This tool creates a new product record in the system, which is a reversible write operation. While it doesn't delete or move money, creating products in a billing system can have downstream effects (e.g., products become available for purchase, affecting revenue).

From the tool's definition Tool name 'create_product' and description 'Create a product. POST /products' indicate a create operation that modifies data by adding a new product record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_product Rate-limited

create_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": {
    "create_product": {
      "limits": [
        {
          "counter": "create_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 Rebillia MCP Server, so you can run agents against it safely.

FAQ

Questions about create_product

What does the create_product tool do? +

Create a product. POST /products. Required: name, category. Optional: description, internalProductId, sku. It is categorised as a Write tool in the Rebillia MCP 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 create_product? +

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

What risk level is create_product? +

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

Can I rate-limit create_product? +

Yes. Add a rate_limit block to the create_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 create_product completely? +

Set action: deny in the PolicyLayer policy for create_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 create_product? +

create_product is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.