aws_cloudformation_create_stack · AWS MCP Server MCP

WHAT IT DOES

What aws_cloudformation_create_stack does on AWS MCP Server

AI agents use aws_cloudformation_create_stack 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_cloudformation_create_stack needs a policy

This tool creates infrastructure resources via CloudFormation, which modifies cloud state and provisions new resources. While stack creation is reversible (via deletion), the blast radius is significant because a malicious or erroneous stack creation can instantiate costly resources (EC2 instances, RDS databases, etc.), consume budget, and impact production environments.

From the tool's definition Tool name is 'aws_cloudformation_create_stack' and description states 'Create CloudFormation stack'. The 'create' verb and the CloudFormation context indicate resource creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

aws_cloudformation_create_stack Rate-limited

aws_cloudformation_create_stack 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_cloudformation_create_stack": {
      "limits": [
        {
          "counter": "aws_cloudformation_create_stack_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_cloudformation_create_stack

What does the aws_cloudformation_create_stack tool do? +

Create CloudFormation stack. 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_cloudformation_create_stack? +

Register the AWS MCP Server MCP server in PolicyLayer and add a rule for aws_cloudformation_create_stack: 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_cloudformation_create_stack? +

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

Can I rate-limit aws_cloudformation_create_stack? +

Yes. Add a rate_limit block to the aws_cloudformation_create_stack 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_cloudformation_create_stack completely? +

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

aws_cloudformation_create_stack 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.