openems_export_design · Mcp Openems MCP: Risk & Policy

WHAT IT DOES

What openems_export_design does on Mcp Openems

AI agents use openems_export_design to create or update resources in Mcp Openems — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Openems environment.

WHY IT NEEDS A POLICY

Why openems_export_design needs a policy

This tool creates new files or data exports in various formats from existing design data. It is a Write operation because it generates and outputs data artifacts. It is not Read (data retrieval only) because export implies creating new files; not Execute because it does not run simulations or trigger external operations; not Destructive because exports are additive and reversible; not Financial because no monetary…

From the tool's definition Tool name 'export_design' and description 'Export antenna design for visualization' indicates creation/writing of output files in specified formats (json, svg, ascii).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

openems_export_design Rate-limited

openems_export_design 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": {
    "openems_export_design": {
      "limits": [
        {
          "counter": "openems_export_design_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Openems, so you can run agents against it safely.

FAQ

Questions about openems_export_design

What does the openems_export_design tool do? +

Export antenna design for visualization. Formats: json (full data), svg (vector graphic), ascii (terminal art). It is categorised as a Write tool in the Mcp Openems MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on openems_export_design? +

Register the Mcp Openems MCP server in PolicyLayer and add a rule for openems_export_design: 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 Mcp Openems. Nothing to install.

What risk level is openems_export_design? +

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

Can I rate-limit openems_export_design? +

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

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

openems_export_design is provided by the Mcp Openems MCP server (rfingadam/mcp-openems). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.