get_ratsnest

Estimate ratsnest/airwire segments and lengths from current pad positions grouped by net.

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

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mixelpixx-kicad-mcp-server/get-ratsnest.md

WHAT IT DOES

What get_ratsnest does on KiCAD-MCP-Server

AI agents call get_ratsnest to retrieve information from KiCAD-MCP-Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_ratsnest is rated Low

This tool queries and calculates metrics (ratsnest segments and lengths) from existing PCB design data without modifying state, executing arbitrary code, or causing side effects. It is a read-only diagnostic query typical of CAD analysis features.

From the tool's definition Tool name is 'get_ratsnest' and description states it 'Estimate ratsnest/airwire segments and lengths from current pad positions grouped by net' — purely a retrieval/analysis operation with no modification, deletion, or execution of external code.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_ratsnest 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 get_ratsnest, this is the rule to start with:

get_ratsnest Allowed

get_ratsnest is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_ratsnest": {}
  }
}

ALLOW ONLY 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 get_ratsnest call is checked against it from then on.

FAQ

Questions about get_ratsnest

What does the get_ratsnest tool do? +

Estimate ratsnest/airwire segments and lengths from current pad positions grouped by net. It is categorised as a Read tool in the KiCAD-MCP-Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_ratsnest? +

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

get_ratsnest is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_ratsnest? +

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

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

get_ratsnest 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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