batch_add_no_connects

THE RISK

Medium Risk

Why batch_add_no_connects needs a policy

This tool modifies design metadata (no-connect flags on pins) but does not destroy data or execute arbitrary operations. The changes are reversible, making it Write rather than Destructive. Blast radius is medium because incorrect bulk application could require manual remediation across many pins, but the operation itself doesn't delete data or cause irreversible harm to the board design.

From the tool's definition Tool name 'batch_add_no_connects' and description 'Add no-connect (X) flags to multiple pins in one call' explicitly indicates creation/modification of pin properties in KiCAD design. The action is reversible (flags can be removed or modified later).

Risk signalsBulk/mass operation — affects multiple targets

Documented attack patterns abuse exactly the kind of access batch_add_no_connects gives an agent:

POLICY

How to control batch_add_no_connects

PolicyLayer is an MCP gateway — it sits between your AI agents and KiCAD-MCP-Server, and nothing reaches the server without passing your rules. This is the rule we recommend for batch_add_no_connects:

policy.json

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

batch_add_no_connects 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.

Create a free account and register KiCAD-MCP-Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about batch_add_no_connects

What does the batch_add_no_connects tool do? +

Add no-connect (X) flags to multiple pins in one call, to mark intentionally unconnected pins and silence ERC. It is categorised as a Write tool in the KiCAD-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 batch_add_no_connects? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for batch_add_no_connects: 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-MCP-Server. Nothing to install.

What risk level is batch_add_no_connects? +

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

Can I rate-limit batch_add_no_connects? +

Yes. Add a rate_limit block to the batch_add_no_connects 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 batch_add_no_connects completely? +

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

batch_add_no_connects is provided by the KiCAD-MCP-Server MCP server (mixelpixx/kicad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every KiCAD-MCP-Server tool call.

Start from KiCAD-MCP-Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →