zemax_lde_set_surface · Zemax MCP: Risk & Policy

WHAT IT DOES

What zemax_lde_set_surface does on Zemax

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

WHY IT NEEDS A POLICY

Why zemax_lde_set_surface needs a policy

This tool creates or modifies data in the optical design system (Zemax OpticStudio lens design database) in a reversible manner. While changes to optical designs could affect physical manufacturing downstream, the tool itself performs data modification within the design software without irreversible deletion, code execution, or financial transactions.

From the tool's definition Tool name and description indicate modifying optical design surfaces: 'Edit a surface' with the ability to change parameters.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

zemax_lde_set_surface Rate-limited

zemax_lde_set_surface 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": {
    "zemax_lde_set_surface": {
      "limits": [
        {
          "counter": "zemax_lde_set_surface_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 Zemax, so you can run agents against it safely.

FAQ

Questions about zemax_lde_set_surface

What does the zemax_lde_set_surface tool do? +

Edit a surface (0-based index). Any omitted parameter is left unchanged. It is categorised as a Write tool in the Zemax MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on zemax_lde_set_surface? +

Register the Zemax MCP server in PolicyLayer and add a rule for zemax_lde_set_surface: 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 Zemax. Nothing to install.

What risk level is zemax_lde_set_surface? +

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

Can I rate-limit zemax_lde_set_surface? +

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

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

zemax_lde_set_surface is provided by the Zemax MCP server (webworn/zemax-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

zemax_lde_set_surface is one line of Zemax's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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