tag_resource · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What tag_resource does on AWS IoT SiteWise MCP Server

AI agents use tag_resource 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 tag_resource needs a policy

The name 'tag_resource' strongly suggests it adds or modifies tags (metadata key-value pairs) on an AWS IoT SiteWise resource. Tagging is a reversible write operation with moderate blast radius (incorrect tags could affect billing, access control policies, or resource organization). Description is empty, so confidence is reduced.

From the tool's definition Tool name 'tag_resource' — description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tag_resource Rate-limited

tag_resource 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": {
    "tag_resource": {
      "limits": [
        {
          "counter": "tag_resource_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 tag_resource

What does the tag_resource tool do? +

tag_resource. 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 tag_resource? +

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

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

Can I rate-limit tag_resource? +

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

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

tag_resource 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.