add_sheet_pin · KiCAD Schematic Manipulation MCP Server MCP

WHAT IT DOES

What add_sheet_pin does on KiCAD Schematic Manipulation MCP Server

AI agents use add_sheet_pin 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_sheet_pin needs a policy

This tool creates a new hierarchical sheet pin, which modifies the schematic reversibly. It does not delete, execute code, or move money. The modification is structural but can be undone (typical for design file operations). Medium severity reflects that incorrect pins could disrupt schematic integrity or component connections, but the change is not irreversible at the file system level.

From the tool's definition Tool name 'add_sheet_pin' and description 'Add pin to hierarchical sheet' indicate creation of new schematic elements. The verb 'add' and context of KiCAD schematic manipulation show this modifies the schematic file by introducing new structural components.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_sheet_pin Rate-limited

add_sheet_pin 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_sheet_pin": {
      "limits": [
        {
          "counter": "add_sheet_pin_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_sheet_pin

What does the add_sheet_pin tool do? +

Add pin to hierarchical sheet. 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_sheet_pin? +

Register the KiCAD Schematic Manipulation MCP Server MCP server in PolicyLayer and add a rule for add_sheet_pin: 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_sheet_pin? +

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

Can I rate-limit add_sheet_pin? +

Yes. Add a rate_limit block to the add_sheet_pin 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_sheet_pin completely? +

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

add_sheet_pin 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.