set_page_size · Kicad MCP: Risk & Policy

WHAT IT DOES

What set_page_size does on Kicad

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

WHY IT NEEDS A POLICY

Why set_page_size needs a policy

The tool modifies project settings (page size) but does not execute external code, delete data irreversibly, or move money. This is a reversible modification operation. Confidence is moderate due to empty description; if it affected constraints or locked settings, severity could be higher.

From the tool's definition Tool name 'set_page_size' indicates modification of page/document settings. Server description mentions 'read/write' capabilities for KiCad project automation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_page_size Rate-limited

set_page_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_page_size": {
      "limits": [
        {
          "counter": "set_page_size_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 Kicad, so you can run agents against it safely.

FAQ

Questions about set_page_size

What does the set_page_size tool do? +

set_page_size. It is categorised as a Write tool in the Kicad 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_page_size? +

Register the Kicad MCP server in PolicyLayer and add a rule for set_page_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. Nothing to install.

What risk level is set_page_size? +

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

Can I rate-limit set_page_size? +

Yes. Add a rate_limit block to the set_page_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_page_size completely? +

Set action: deny in the PolicyLayer policy for set_page_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_page_size? +

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