set_board_size

Set the size of the PCB board

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/set-board-size.md

WHAT IT DOES

What set_board_size does on KiCAD-MCP-Server

AI agents use set_board_size 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 set_board_size is rated Medium

This tool modifies PCB board design data (board dimensions) which is a core design parameter. The operation is reversible—board size can be changed again—so it is Write rather than Destructive. The severity is medium because changing board size could break component placements or violate design constraints, but an AI agent could potentially recover or remediate such issues through subsequent tool calls.

From the tool's definition Tool name 'set_board_size' combined with description 'Set the size of the PCB board' indicates modification of board design parameters. This is a reversible configuration change to the PCB design.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

set_board_size Rate-limited

set_board_size 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": {
    "set_board_size": {
      "limits": [
        {
          "counter": "set_board_size_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 set_board_size call is checked against it from then on.

FAQ

Questions about set_board_size

What does the set_board_size tool do? +

Set the size of the PCB board. 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 set_board_size? +

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

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

Can I rate-limit set_board_size? +

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

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

set_board_size 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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