policy_create · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What policy_create does on AWS IoT SiteWise MCP Server

AI agents use policy_create 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 policy_create needs a policy

The tool creates a new policy artifact, which is a reversible Write operation. However, the severity is elevated to 'high' because policies—especially IAM/security policies—control access to AWS resources; misconfiguration or malicious policy creation could grant unintended permissions across the environment, affecting confidentiality, integrity, and availability.

From the tool's definition Tool name 'policy_create' indicates creation of a policy object. Context shows sibling tools like 'add_inline_policy' and 'add_user_to_group' that perform identity and access control operations. Empty description limits confidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

policy_create Rate-limited

policy_create 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": {
    "policy_create": {
      "limits": [
        {
          "counter": "policy_create_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 policy_create

What does the policy_create tool do? +

policy_create. 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 policy_create? +

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

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

Can I rate-limit policy_create? +

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

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

policy_create 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.