add_wire · KiCAD Schematic Manipulation MCP Server MCP

WHAT IT DOES

What add_wire does on KiCAD Schematic Manipulation MCP Server

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

WHY IT NEEDS A POLICY

Why add_wire needs a policy

This tool creates new wire connections in a schematic file, which is a data modification operation. It is reversible (wires can be deleted), so it falls under Write rather than Destructive. The severity is medium because incorrect wire additions could create electrical design errors that propagate through a project, but the changes are not permanent and can be undone.

From the tool's definition Tool name 'add_wire' and description 'Add a wire connection between two points' explicitly perform creation (add) of a schematic element. The context of KiCAD schematic manipulation confirms this is reversible data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_wire Rate-limited

add_wire 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_wire": {
      "limits": [
        {
          "counter": "add_wire_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 Schematic Manipulation MCP Server, so you can run agents against it safely.

FAQ

Questions about add_wire

What does the add_wire tool do? +

Add a wire connection between two points. It is categorised as a Write tool in the KiCAD Schematic Manipulation 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_wire? +

Register the KiCAD Schematic Manipulation MCP Server MCP server in PolicyLayer and add a rule for add_wire: 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 Schematic Manipulation MCP Server. Nothing to install.

What risk level is add_wire? +

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

Can I rate-limit add_wire? +

Yes. Add a rate_limit block to the add_wire 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_wire completely? +

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

add_wire is provided by the KiCAD Schematic Manipulation MCP Server MCP server (richard-luc/kicad-schematic-manipulation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.