list_remove · AWS IoT SiteWise MCP Server MCP: Risk & Policy

WHAT IT DOES

What list_remove does on AWS IoT SiteWise MCP Server

AI agents invoke list_remove to trigger actions in AWS IoT SiteWise MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why list_remove needs a policy

The description suggests in-place modification of a list data structure, which could be a Write or Execute operation. However, the description is vague and doesn't clearly indicate whether this operates on AWS IoT SiteWise resources or is a utility function. The context of an IoT SiteWise MCP server lowers confidence that this is merely a local list utility.

From the tool's definition 'Remove occurrences of value from list' — modifies a list by removing elements

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

list_remove Rate-limited

list_remove stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_remove": {
      "limits": [
        {
          "counter": "list_remove_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 list_remove

What does the list_remove tool do? +

Remove occurrences of value from list. It is categorised as a Execute tool in the AWS IoT SiteWise MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on list_remove? +

Register the AWS IoT SiteWise MCP Server MCP server in PolicyLayer and add a rule for list_remove: 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 list_remove? +

list_remove is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit list_remove? +

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

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

list_remove 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.