export_gerbers

SERVERKiCAD-MCP-Server SOURCEmixelpixx/kicad-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mixelpixx-kicad-mcp-server/export-gerbers.md

WHAT IT DOES

What export_gerbers does on KiCAD-MCP-Server

AI agents use export_gerbers to create or update resources in KiCAD-MCP-Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your KiCAD-MCP-Server environment.

RISK

Why export_gerbers is rated Medium

Exporting Gerbers creates new files on disk but is reversible (files can be deleted or regenerated). This is a Write operation rather than Read (it generates output, not just retrieves existing data) or Execute (while it invokes kicad-cli, the primary effect is file creation, not arbitrary command execution).

From the tool's definition Tool creates and exports Gerber files, which are generated output files. Description explicitly states it 'Plot Gerber files' and 'exposing the full Plot-dialog option set', indicating file generation with multiple configurable parameters.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs export_gerbers safely

PolicyLayer is an MCP gateway: it sits between your AI agents and KiCAD-MCP-Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For export_gerbers, this is the rule to start with:

export_gerbers Rate-limited

export_gerbers 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": {
    "export_gerbers": {
      "limits": [
        {
          "counter": "export_gerbers_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect KiCAD-MCP-Server, apply this rule, and every export_gerbers call is checked against it from then on.

FAQ

Questions about export_gerbers

What does the export_gerbers tool do? +

Plot Gerber files for a PCB via kicad-cli, exposing the full Plot-dialog option set (X2, netlist attributes, DNP handling, soldermask subtraction, precision, drill-file origin, stored board plot settings, etc). Reads the board from disk, so it reflects the last SAVED state of the .kicad_pcb. It is categorised as a Write tool in the KiCAD-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 export_gerbers? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for export_gerbers: 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 KiCAD-MCP-Server. Nothing to install.

What risk level is export_gerbers? +

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

Can I rate-limit export_gerbers? +

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

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

export_gerbers is provided by the KiCAD-MCP-Server MCP server (mixelpixx/kicad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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