save_drawing · AutoCAD MCP Server MCP: Risk & Policy

WHAT IT DOES

What save_drawing does on AutoCAD MCP Server

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

WHY IT NEEDS A POLICY

Why save_drawing needs a policy

The tool creates or overwrites a file on disk with drawing data, which is a reversible write operation. It does not delete data (Destructive), execute arbitrary commands (Execute), or move money (Financial). While file operations can have side effects, saving is a standard reversible data modification action.

From the tool's definition Tool name and description state it 'Save the current drawing to a DWG file' — this modifies and persists data to disk in a CAD format.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_drawing Rate-limited

save_drawing 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": {
    "save_drawing": {
      "limits": [
        {
          "counter": "save_drawing_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches AutoCAD MCP Server, so you can run agents against it safely.

FAQ

Questions about save_drawing

What does the save_drawing tool do? +

Save the current drawing to a DWG file. It is categorised as a Write tool in the AutoCAD MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on save_drawing? +

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

What risk level is save_drawing? +

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

Can I rate-limit save_drawing? +

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

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

save_drawing is provided by the AutoCAD MCP Server MCP server (porta048/autocad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.