stream_group_create

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/stream-group-create.md

WHAT IT DOES

What stream_group_create does on AWS

AI agents use stream_group_create 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 stream_group_create is rated Medium

The tool creates a new group (reversible via deletion). This is a Write operation rather than Read (no retrieval), Execute (no code execution), or Destructive (creation is reversible). Severity is high because creating groups in AWS access control systems can grant permissions to multiple users and impact security posture, though the impact is bounded by the specific group created.

From the tool's definition Tool name 'stream_group_create' indicates creation of a group resource. Sibling tools include 'add_user_to_group', 'attach_group_policy', 'attach_user_policy', suggesting this server manages AWS IAM/access control resources.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stream_group_create 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 stream_group_create, this is the rule to start with:

stream_group_create Rate-limited

stream_group_create 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": {
    "stream_group_create": {
      "limits": [
        {
          "counter": "stream_group_create_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 stream_group_create call is checked against it from then on.

FAQ

Questions about stream_group_create

What does the stream_group_create tool do? +

stream_group_create 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 stream_group_create? +

Register the AWS MCP server in PolicyLayer and add a rule for stream_group_create: 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 stream_group_create? +

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

Can I rate-limit stream_group_create? +

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

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

stream_group_create 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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