create_role

A write tool on the AWS MCP server.

SERVERAWS SOURCE@awslabs/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/create-role.md

WHAT IT DOES

What create_role does on AWS

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

RISK

Why create_role is rated Medium

Creating an IAM role is a Write operation—it creates new identity/access entities reversibly. Severity is high because roles grant permissions and can enable unauthorized access if misconfigured by an agent, but the operation is not Destructive (reversible) or Financial. Confidence is 0.85 rather than higher due to empty tool description, but the name and context are clear.

From the tool's definition Tool name 'create_role' on AWS server indicates creation of IAM role, a reversible but security-sensitive operation. Sibling tools (attach_group_policy, attach_user_policy, add_user_to_group) confirm AWS identity/access management context.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_role safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_role, this is the rule to start with:

create_role Rate-limited

create_role 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_role": {
      "limits": [
        {
          "counter": "create_role_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AWS, apply this rule, and every create_role call is checked against it from then on.

FAQ

Questions about create_role

What does the create_role tool do? +

create_role is a write tool on the AWS MCP server. It is categorised as a Write tool in the AWS 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_role? +

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

What risk level is create_role? +

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

Can I rate-limit create_role? +

Yes. Add a rate_limit block to the create_role 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_role completely? +

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

create_role is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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