set_design_rules

What set_design_rules does on KiCAD-MCP-Server

AI agents use set_design_rules 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.

Why set_design_rules is rated Medium

set_design_rules creates or modifies design rule parameters that affect how a PCB design is validated and manufactured. These changes are reversible (can be reconfigured), making this a Write operation rather than Destructive. Severity is medium because incorrect design rules could lead to manufacturing issues or board non-functionality, but the changes can be undone and there is no data deletion or financial impact.

From the tool's definition Tool modifies PCB design rules configuration (clearance, track width, via dimensions, courtyard requirements). This is reversible configuration change to a design document. The name 'set_design_rules' and description confirm data modification capability.

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

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_design_rules": {
      "limits": [
        {
          "counter": "set_design_rules_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

Questions about set_design_rules