aws_ec2_create_instance · AWS MCP Server MCP: Risk & Policy

WHAT IT DOES

What aws_ec2_create_instance does on AWS MCP Server

AI agents use aws_ec2_create_instance to create or update resources in AWS MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AWS MCP Server environment.

WHY IT NEEDS A POLICY

Why aws_ec2_create_instance needs a policy

This tool provisions a new EC2 instance in AWS, which is a Write operation (creating a new resource). It is not destructive or financial in the direct sense, but misuse carries high severity because spinning up instances incurs ongoing cloud costs, could expose services to the internet, and consumes quota/capacity. An AI agent misusing this could create many expensive or insecure instances.

From the tool's definition 'Create a new EC2 instance' — creates a new cloud compute resource

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

aws_ec2_create_instance Rate-limited

aws_ec2_create_instance 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": {
    "aws_ec2_create_instance": {
      "limits": [
        {
          "counter": "aws_ec2_create_instance_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about aws_ec2_create_instance

What does the aws_ec2_create_instance tool do? +

Create a new EC2 instance. It is categorised as a Write tool in the AWS 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 aws_ec2_create_instance? +

Register the AWS MCP Server MCP server in PolicyLayer and add a rule for aws_ec2_create_instance: 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 AWS MCP Server. Nothing to install.

What risk level is aws_ec2_create_instance? +

aws_ec2_create_instance is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit aws_ec2_create_instance? +

Yes. Add a rate_limit block to the aws_ec2_create_instance 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 aws_ec2_create_instance completely? +

Set action: deny in the PolicyLayer policy for aws_ec2_create_instance. 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 aws_ec2_create_instance? +

aws_ec2_create_instance is provided by the AWS MCP Server MCP server (lokimcpuniverse/aws-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.