delete_trace

Delete traces from the PCB. Can delete by UUID, position, or bulk-delete all traces on a net.

SERVERKiCAD-MCP-Server SOURCEmixelpixx/kicad-mcp-server

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mixelpixx-kicad-mcp-server/delete-trace.md

WHAT IT DOES

What delete_trace does on KiCAD-MCP-Server

AI agents call delete_trace to permanently remove resources in KiCAD-MCP-Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why delete_trace is rated Critical

This tool irreversibly removes traces from a PCB layout. While not as critical as deleting an entire board design, trace deletion cannot be undone and represents permanent loss of design work. The capability to bulk-delete all traces on a net amplifies the blast radius.

From the tool's definition Tool name contains "delete" and description explicitly states "Delete traces from the PCB." This action "cannot be undone" as per the Destructive category definition.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete_trace safely

PolicyLayer is an MCP gateway: it sits between your AI agents and KiCAD-MCP-Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete_trace, this is the rule to start with:

delete_trace Hidden

delete_trace is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_trace"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect KiCAD-MCP-Server, apply this rule, and every delete_trace call is checked against it from then on.

FAQ

Questions about delete_trace

What does the delete_trace tool do? +

Delete traces from the PCB. Can delete by UUID, position, or bulk-delete all traces on a net. It is categorised as a Destructive tool in the KiCAD-MCP-Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_trace? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for delete_trace: 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 delete_trace? +

delete_trace is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete_trace? +

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

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

delete_trace 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.

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