# layer_freeze

Freeze a layer (makes it invisible and unselectable, faster regeneration).

Agent View of the PolicyLayer registry record for `layer_freeze`. HTML page: https://policylayer.com/tools/u-c4n-autocad-mcp/layer-freeze

## Facts

- Tool: `layer_freeze`
- Server: AutoCAD MCP Pro (`u-c4n/autocad-mcp`) — https://policylayer.com/tools/u-c4n-autocad-mcp.md
- Homepage: https://github.com/U-C4N/Autocad-MCP
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "layer_freeze",
    "arguments": {}
  }
}
```

## Why layer_freeze is rated Medium

Freezing a layer modifies drawing properties but is reversible—the layer can be unfrozen to restore its prior state. This makes it Write rather than Destructive. The severity is medium because misuse by an AI agent could hide critical design elements or layers, potentially causing confusion or design errors, but the change can be undone.

From the tool's own definition: "Tool name 'layer_freeze' and description 'Freeze a layer (makes it invisible and unselectable, faster regeneration)' indicate modification of layer properties."

## Use case

AI agents use layer_freeze 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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches AutoCAD MCP Pro:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "layer_freeze": {
      "limits": [
        {
          "counter": "layer_freeze_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on AutoCAD MCP Pro (246)

- `block_explode` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/block-explode.md
- `construction_clear` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/construction-clear.md
- `drawing_purge` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/drawing-purge.md
- `entity_delete` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/entity-delete.md
- `entity_delete_many` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/entity-delete-many.md
- `layer_delete` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/layer-delete.md
- `layer_state_delete` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/layer-state-delete.md
- `layout_delete` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/layout-delete.md
- `transaction_rollback` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/transaction-rollback.md
- `viewport_delete` — Destructive — https://policylayer.com/tools/u-c4n-autocad-mcp/viewport-delete.md
- `batch_plot` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/batch-plot.md
- `cad_batch` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/cad-batch.md
- `entity_array_polar` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/entity-array-polar.md
- `gear_draw_section_aa` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/gear-draw-section-aa.md
- `pid_tag_parse` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/pid-tag-parse.md
- `solid_boolean` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/solid-boolean.md
- `solid_extrude` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/solid-extrude.md
- `solid_revolve` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/solid-revolve.md
- `system_launch` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/system-launch.md
- `system_run_command` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/system-run-command.md
- `system_run_lisp` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/system-run-lisp.md
- `view_named_restore` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/view-named-restore.md
- `view_zoom_extents` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/view-zoom-extents.md
- `view_zoom_window` — Execute — https://policylayer.com/tools/u-c4n-autocad-mcp/view-zoom-window.md
- `datum_feature` — Other — https://policylayer.com/tools/u-c4n-autocad-mcp/datum-feature.md
- `drawing_critique` — Other — https://policylayer.com/tools/u-c4n-autocad-mcp/drawing-critique.md
- `drawing_finalize` — Other — https://policylayer.com/tools/u-c4n-autocad-mcp/drawing-finalize.md
- `drawing_plan` — Other — https://policylayer.com/tools/u-c4n-autocad-mcp/drawing-plan.md
- `transaction_begin` — Other — https://policylayer.com/tools/u-c4n-autocad-mcp/transaction-begin.md
- `analysis_bounding_box` — Read — https://policylayer.com/tools/u-c4n-autocad-mcp/analysis-bounding-box.md
- …and 216 more: https://policylayer.com/tools/u-c4n-autocad-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=u-c4n-autocad-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/u-c4n-autocad-mcp