create_gateway · Rebillia MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_gateway does on Rebillia MCP Server

AI agents use create_gateway 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_gateway needs a policy

This tool creates a new payment gateway configuration, which is a write operation that modifies system state. While it handles payment processing credentials, it does not itself move money (Financial category) or execute arbitrary code (Execute category).

From the tool's definition Tool creates a payment gateway via POST /gateways with required credentials object. Description explicitly states 'Create a company gateway' and requires 'gblGatewayId, setting (credentials object)'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_gateway Rate-limited

create_gateway 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_gateway": {
      "limits": [
        {
          "counter": "create_gateway_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_gateway

What does the create_gateway tool do? +

Create a company gateway. POST /gateways. Required: gblGatewayId, setting (credentials object). Optional: displayName, card (array of card type IDs), paymentMethod. Use list_global_gateways first to discover valid gblGatewayId and required setting keys (requiredFields / fieldDetails) for each gateway type (e.g. Stripe, Braintree); then build setting with those keys as field names and your credential values. 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_gateway? +

Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for create_gateway: 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_gateway? +

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

Can I rate-limit create_gateway? +

Yes. Add a rate_limit block to the create_gateway 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_gateway completely? +

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

create_gateway 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.