scale_stl · Bambu Printer MCP: Risk & Policy

WHAT IT DOES

What scale_stl does on Bambu Printer

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

WHY IT NEEDS A POLICY

Why scale_stl needs a policy

This tool modifies an STL file by scaling it, which is a reversible transformation of existing data. It creates a modified version of the model file. No code execution, deletion, or financial action is involved. Severity is medium because misuse could corrupt or unintentionally alter 3D model files used in print workflows.

From the tool's definition Scale an STL file by specified factors

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scale_stl Rate-limited

scale_stl 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": {
    "scale_stl": {
      "limits": [
        {
          "counter": "scale_stl_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 Bambu Printer, so you can run agents against it safely.

FAQ

Questions about scale_stl

What does the scale_stl tool do? +

Scale an STL file by specified factors. It is categorised as a Write tool in the Bambu Printer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on scale_stl? +

Register the Bambu Printer MCP server in PolicyLayer and add a rule for scale_stl: 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 Bambu Printer. Nothing to install.

What risk level is scale_stl? +

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

Can I rate-limit scale_stl? +

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

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

scale_stl is provided by the Bambu Printer MCP server (rowbotik/bambu-printer-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.