layer_lock

Lock a layer (entities visible but cannot be selected or modified).

SERVERAutoCAD MCP Pro SOURCEu-c4n/autocad-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/u-c4n-autocad-mcp/layer-lock.md

WHAT IT DOES

What layer_lock does on AutoCAD MCP Pro

AI agents use layer_lock to create or update resources in AutoCAD MCP Pro, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AutoCAD MCP Pro environment.

RISK

Why layer_lock is rated Medium

Locking a layer is a reversible modification operation (can be unlocked). It does not delete data (ruling out Destructive) and does not execute arbitrary code (ruling out Execute). While it restricts access, the core action is modifying layer properties, which is a Write operation.

From the tool's definition Tool description states it 'Lock[s] a layer' which modifies layer state/properties, preventing selection and modification of entities on that layer. This is a state-changing operation on CAD document metadata.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

layer_lock Rate-limited

layer_lock 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": {
    "layer_lock": {
      "limits": [
        {
          "counter": "layer_lock_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 AutoCAD MCP Pro, apply this rule, and every layer_lock call is checked against it from then on.

FAQ

Questions about layer_lock

What does the layer_lock tool do? +

Lock a layer (entities visible but cannot be selected or modified). It is categorised as a Write tool in the AutoCAD MCP Pro MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on layer_lock? +

Register the AutoCAD MCP Pro MCP server in PolicyLayer and add a rule for layer_lock: 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 layer_lock? +

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

Can I rate-limit layer_lock? +

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

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

layer_lock 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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