kicad.add_global_label · Eda MCP: Risk & Policy

WHAT IT DOES

What kicad.add_global_label does on Eda

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

WHY IT NEEDS A POLICY

Why kicad.add_global_label needs a policy

This tool creates or adds a new global label to a KiCad schematic, which modifies the design document. This is a Write operation because: (1) it creates new data (a label object), (2) the change is reversible (labels can be deleted or edited), and (3) it has no side effects beyond updating the design file. It does not execute external code, delete data irreversibly, or move resources.

From the tool's definition Tool description states 'Add a global label' - the verb 'Add' indicates creation of new design elements. Related sibling tools (add_component, add_wire, add_text, add_line) all perform reversible modifications to PCB/schematic designs.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

kicad.add_global_label Rate-limited

kicad.add_global_label 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": {
    "kicad.add_global_label": {
      "limits": [
        {
          "counter": "kicad.add_global_label_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 Eda, so you can run agents against it safely.

FAQ

Questions about kicad.add_global_label

What does the kicad.add_global_label tool do? +

Add a global label (connects across hierarchical sheets). It is categorised as a Write tool in the Eda MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on kicad.add_global_label? +

Register the Eda MCP server in PolicyLayer and add a rule for kicad.add_global_label: 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 Eda. Nothing to install.

What risk level is kicad.add_global_label? +

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

Can I rate-limit kicad.add_global_label? +

Yes. Add a rate_limit block to the kicad.add_global_label 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 kicad.add_global_label completely? +

Set action: deny in the PolicyLayer policy for kicad.add_global_label. 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 kicad.add_global_label? +

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