stream_group_set_id · Amazon MQ MCP Server MCP

WHAT IT DOES

What stream_group_set_id does on Amazon MQ MCP Server

AI agents use stream_group_set_id 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 stream_group_set_id needs a policy

This is a Write operation because it creates or modifies data reversibly. Setting a consumer group's last delivered ID changes the group's consumption state, affecting subsequent message delivery behavior. This is not Read (it modifies, not just queries), not Destructive (the change is reversible by resetting to a different ID), and not Execute (it's a targeted data modification, not arbitrary code execution).

From the tool's definition Tool description states 'Set consumer group's last delivered ID' — this modifies the state of a consumer group by setting its offset/position in the message stream, which affects which messages will be consumed next.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stream_group_set_id Rate-limited

stream_group_set_id 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_set_id": {
      "limits": [
        {
          "counter": "stream_group_set_id_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 stream_group_set_id

What does the stream_group_set_id tool do? +

Set consumer group's last delivered ID. 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 stream_group_set_id? +

Register the Amazon MQ MCP Server MCP server in PolicyLayer and add a rule for stream_group_set_id: 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 stream_group_set_id? +

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

Can I rate-limit stream_group_set_id? +

Yes. Add a rate_limit block to the stream_group_set_id 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_set_id completely? +

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

stream_group_set_id 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.