esm_guidance · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What esm_guidance does on AWS IoT SiteWise MCP Server

AI agents use esm_guidance 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 esm_guidance needs a policy

This tool creates and configures multiple AWS infrastructure components (VPCs, security groups, IAM roles, Kafka/Kinesis/DynamoDB/SQS integrations, Lambda Event Source Mappings) and generates SAM deployment templates. This is a Write/provisioning operation that modifies cloud infrastructure state.

From the tool's definition Create and configure AWS infrastructure... Sets up VPCs, security groups, IAM roles, and Event Source Mappings. Generates complete SAM templates for deployment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

esm_guidance Rate-limited

esm_guidance 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": {
    "esm_guidance": {
      "limits": [
        {
          "counter": "esm_guidance_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 esm_guidance

What does the esm_guidance tool do? +

Create and configure AWS infrastructure for streaming data processing. Handles Kafka clusters (MSK), Kinesis streams, DynamoDB streams, SQS queues with Lambda functions. Sets up VPCs, security groups, IAM roles, and Event Source Mappings. Generates complete SAM templates for deployment. 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 esm_guidance? +

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

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

Can I rate-limit esm_guidance? +

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

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

esm_guidance 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.