sorted_set_add · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What sorted_set_add does on AWS IoT SiteWise MCP Server

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

WHY IT NEEDS A POLICY

Why sorted_set_add needs a policy

This tool performs a write operation—adding or updating members in a sorted set—which is reversible via removal or update operations. While it modifies data, it does not irreversibly delete data (not Destructive), execute arbitrary code (not Execute), nor involve financial transactions.

From the tool's definition Tool name 'sorted_set_add' and description 'Add member-score pairs to sorted set' indicate a data modification operation that creates or updates entries in a sorted data structure.

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 AWS IoT SiteWise 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 AWS IoT SiteWise 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 AWS IoT SiteWise 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 AWS IoT SiteWise 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 AWS IoT SiteWise MCP Server MCP server (awslabs.aws-iot-sitewise-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.