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

WHAT IT DOES

What sam_init does on AWS IoT SiteWise MCP Server

AI agents invoke sam_init 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 sam_init needs a policy

The name 'sam_init' strongly implies execution of AWS SAM CLI initialization, which creates project scaffolding, writes files, and may execute setup scripts. However, the description is empty, which significantly reduces confidence. Based on name alone, this falls under Execute as it likely runs a CLI operation with side effects.

From the tool's definition Tool name 'sam_init' suggests AWS SAM (Serverless Application Model) initialization, which runs commands to scaffold/initialize serverless application projects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sam_init Rate-limited

sam_init 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": {
    "sam_init": {
      "limits": [
        {
          "counter": "sam_init_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 sam_init

What does the sam_init tool do? +

sam_init. 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 sam_init? +

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

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

Can I rate-limit sam_init? +

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

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

sam_init 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.