begin_undo_group

Begin an AutoCAD undo group for transactional CADPlan execution.

SERVERPypi:best Cad SOURCEpypi:best-cad-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-lokmenower-best-cad-mcp/begin-undo-group.md

WHAT IT DOES

What begin_undo_group does on Pypi:best Cad

AI agents use begin_undo_group to create or update resources in Pypi:best Cad, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:best Cad environment.

RISK

Why begin_undo_group is rated Medium

This tool starts an undo group, which is a transactional boundary marker in AutoCAD. It doesn't itself modify, delete, or execute CAD operations, but it enables grouping of subsequent operations for undo purposes. It's a Write-category setup action with low severity since it only begins a transaction boundary and doesn't directly cause data changes or irreversible effects.

From the tool's definition Begin an AutoCAD undo group for transactional CADPlan execution

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs begin_undo_group safely

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

begin_undo_group Rate-limited

begin_undo_group 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": {
    "begin_undo_group": {
      "limits": [
        {
          "counter": "begin_undo_group_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pypi:best Cad, apply this rule, and every begin_undo_group call is checked against it from then on.

FAQ

Questions about begin_undo_group

What does the begin_undo_group tool do? +

Begin an AutoCAD undo group for transactional CADPlan execution. It is categorised as a Write tool in the Pypi:best Cad MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on begin_undo_group? +

Register the Pypi:best Cad MCP server in PolicyLayer and add a rule for begin_undo_group: 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 Pypi:best Cad. Nothing to install.

What risk level is begin_undo_group? +

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

Can I rate-limit begin_undo_group? +

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

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

begin_undo_group is provided by the Pypi:best Cad MCP server (pypi:best-cad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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