drawing_purge

Purge all unused objects (layers, blocks, linetypes, styles) from the drawing.

SERVERAutoCAD MCP Pro SOURCEu-c4n/autocad-mcp

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/u-c4n-autocad-mcp/drawing-purge.md

WHAT IT DOES

What drawing_purge does on AutoCAD MCP Pro

AI agents call drawing_purge to permanently remove resources in AutoCAD MCP Pro, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why drawing_purge is rated Critical

Purging removes unused definitions from a CAD drawing permanently and irreversibly. Once layers, blocks, linetypes, and styles are purged, they cannot be recovered without an external backup. This is a destructive operation with a high blast radius since it can silently remove design assets that may be needed later, especially in a production CAD environment.

From the tool's definition Purge all unused objects (layers, blocks, linetypes, styles) from the drawing

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs drawing_purge safely

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

drawing_purge Hidden

drawing_purge 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": [
    "drawing_purge"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AutoCAD MCP Pro, apply this rule, and every drawing_purge call is checked against it from then on.

FAQ

Questions about drawing_purge

What does the drawing_purge tool do? +

Purge all unused objects (layers, blocks, linetypes, styles) from the drawing. It is categorised as a Destructive tool in the AutoCAD MCP Pro 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 drawing_purge? +

Register the AutoCAD MCP Pro MCP server in PolicyLayer and add a rule for drawing_purge: 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 AutoCAD MCP Pro. Nothing to install.

What risk level is drawing_purge? +

drawing_purge 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 drawing_purge? +

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

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

drawing_purge is provided by the AutoCAD MCP Pro MCP server (u-c4n/autocad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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