remove_user_from_group

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/remove-user-from-group.md

WHAT IT DOES

What remove_user_from_group does on AWS

AI agents use remove_user_from_group 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 remove_user_from_group is rated Medium

Removing a user from a group modifies access control membership. This is a reversible write operation (the user can be re-added), but it could revoke permissions and cause access disruptions. Confidence is reduced due to empty description. Severity is high because IAM group membership changes can have broad security implications.

From the tool's definition Tool name: 'remove_user_from_group' — implies removing a user from a group, which modifies IAM/directory membership.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

remove_user_from_group Rate-limited

remove_user_from_group 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": {
    "remove_user_from_group": {
      "limits": [
        {
          "counter": "remove_user_from_group_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 remove_user_from_group call is checked against it from then on.

FAQ

Questions about remove_user_from_group

What does the remove_user_from_group tool do? +

remove_user_from_group 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 remove_user_from_group? +

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

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

Can I rate-limit remove_user_from_group? +

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

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

remove_user_from_group 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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