modify-cache-cluster · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What modify-cache-cluster does on AWS IoT SiteWise MCP Server

AI agents use modify-cache-cluster 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 modify-cache-cluster needs a policy

The 'modify-cache-cluster' tool performs modification operations on cache infrastructure, which creates reversible changes to system state. This falls under Write rather than Execute because it modifies existing resources rather than running arbitrary code. Severity is high because cache cluster modifications can affect system performance, data availability, and service reliability.

From the tool's definition Tool name 'modify-cache-cluster' indicates modification of cache cluster configuration or state. Context of AWS IoT SiteWise MCP server suggests infrastructure/resource management capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify-cache-cluster Rate-limited

modify-cache-cluster 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": {
    "modify-cache-cluster": {
      "limits": [
        {
          "counter": "modify-cache-cluster_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 modify-cache-cluster

What does the modify-cache-cluster tool do? +

modify-cache-cluster. 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 modify-cache-cluster? +

Register the AWS IoT SiteWise MCP Server MCP server in PolicyLayer and add a rule for modify-cache-cluster: 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 modify-cache-cluster? +

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

Can I rate-limit modify-cache-cluster? +

Yes. Add a rate_limit block to the modify-cache-cluster 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 modify-cache-cluster completely? +

Set action: deny in the PolicyLayer policy for modify-cache-cluster. 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 modify-cache-cluster? +

modify-cache-cluster 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.