UntagResource · Amazon MQ MCP Server MCP: Risk & Policy

WHAT IT DOES

What UntagResource does on Amazon MQ MCP Server

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

WHY IT NEEDS A POLICY

Why UntagResource needs a policy

Removing tags is a metadata modification that is reversible (tags can be re-added). It does not delete the resource itself, execute code, or have financial implications. It qualifies as a Write operation with low severity since tag removal rarely causes significant harm.

From the tool's definition Removes the tags, identified by the keys, from the specified resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

UntagResource Rate-limited

UntagResource 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": {
    "UntagResource": {
      "limits": [
        {
          "counter": "untagresource_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about UntagResource

What does the UntagResource tool do? +

Removes the tags, identified by the keys, from the specified resource. It is categorised as a Write tool in the Amazon MQ 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 UntagResource? +

Register the Amazon MQ MCP Server MCP server in PolicyLayer and add a rule for UntagResource: 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 Amazon MQ MCP Server. Nothing to install.

What risk level is UntagResource? +

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

Can I rate-limit UntagResource? +

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

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

UntagResource is provided by the Amazon MQ MCP Server MCP server (awslabs.amazon-mq-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.