sorted_set_add · Amazon MQ MCP Server MCP: Risk & Policy

WHAT IT DOES

What sorted_set_add does on Amazon MQ MCP Server

AI agents use sorted_set_add 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 sorted_set_add needs a policy

This tool performs a reversible write operation that creates or modifies entries in a sorted set. The 'add' operation modifies data state but does not delete or destroy information, making it Write rather than Destructive. While the broader server manages message brokers, this specific tool's scope is limited to data modification within a single data structure.

From the tool's definition Tool name 'sorted_set_add' and description 'Add member-score pairs to sorted set' indicate creation/modification of data in a sorted set data structure without deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sorted_set_add Rate-limited

sorted_set_add 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": {
    "sorted_set_add": {
      "limits": [
        {
          "counter": "sorted_set_add_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 sorted_set_add

What does the sorted_set_add tool do? +

Add member-score pairs to sorted set. 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 sorted_set_add? +

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

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

Can I rate-limit sorted_set_add? +

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

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

sorted_set_add 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.