add_label_to_pin | PolicyLayer

WHAT IT DOES

What add_label_to_pin does on KiCAD Schematic Manipulation MCP Server

AI agents use add_label_to_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_label_to_pin needs a policy

This tool creates or modifies schematic metadata (pin labels) reversibly. The operation is Write-class because it adds annotations to existing components without executing code, running external operations, or permanently destroying data.

From the tool's definition Tool adds/modifies labels on component pins in KiCAD schematics. Description states 'Add label directly to component pin' - an additive operation that creates new schematic annotations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_label_to_pin Rate-limited

add_label_to_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_label_to_pin": {
      "limits": [
        {
          "counter": "add_label_to_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_label_to_pin

What does the add_label_to_pin tool do? +

Add label directly to component pin. 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_label_to_pin? +

Register the KiCAD Schematic Manipulation MCP Server MCP server in PolicyLayer and add a rule for add_label_to_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_label_to_pin? +

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

Can I rate-limit add_label_to_pin? +

Yes. Add a rate_limit block to the add_label_to_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_label_to_pin completely? +

Set action: deny in the PolicyLayer policy for add_label_to_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_label_to_pin? +

add_label_to_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.