add_copper_pour

Add a copper pour (ground/power plane) to the PCB

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/add-copper-pour.md

WHAT IT DOES

What add_copper_pour does on KiCAD-MCP-Server

AI agents use add_copper_pour 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 add_copper_pour is rated Medium

This tool creates or modifies PCB design data by adding copper pour regions. While it modifies the PCB layout, the operation is reversible (the copper pour can be removed or edited). It does not irreversibly delete data, execute arbitrary code, or involve financial transactions. This fits the Write category as it creates/modifies design data reversibly.

From the tool's definition Tool performs 'Add a copper pour (ground/power plane) to the PCB' — creates a new copper pour region on the PCB which modifies the board design by adding a conductive plane. This is a reversible creation operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_copper_pour 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 add_copper_pour, this is the rule to start with:

add_copper_pour Rate-limited

add_copper_pour 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": {
    "add_copper_pour": {
      "limits": [
        {
          "counter": "add_copper_pour_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 add_copper_pour call is checked against it from then on.

FAQ

Questions about add_copper_pour

What does the add_copper_pour tool do? +

Add a copper pour (ground/power plane) to the 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 add_copper_pour? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for add_copper_pour: 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 add_copper_pour? +

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

Can I rate-limit add_copper_pour? +

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

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

add_copper_pour 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.

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