create_nat_gateway · OCI MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_nat_gateway does on OCI MCP Server

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

WHY IT NEEDS A POLICY

Why create_nat_gateway needs a policy

Creating a NAT gateway modifies cloud infrastructure by adding a new networking component that enables egress traffic from private subnets. This is a Write operation because it creates a new resource that can be deleted or modified.

From the tool's definition Tool name 'create_nat_gateway' and description 'Create a NAT gateway (egress for private subnets)' indicate creation of a network infrastructure resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_nat_gateway Rate-limited

create_nat_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_nat_gateway": {
      "limits": [
        {
          "counter": "create_nat_gateway_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about create_nat_gateway

What does the create_nat_gateway tool do? +

Create a NAT gateway (egress for private subnets). It is categorised as a Write tool in the OCI 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_nat_gateway? +

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

What risk level is create_nat_gateway? +

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

Can I rate-limit create_nat_gateway? +

Yes. Add a rate_limit block to the create_nat_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_nat_gateway completely? +

Set action: deny in the PolicyLayer policy for create_nat_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_nat_gateway? +

create_nat_gateway is provided by the OCI MCP Server MCP server (sarthak-pansare/oci-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.