rhino_export_stl

Export meshes to an ASCII STL file.

SERVERRhino SOURCEeasehee/rhino-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/easehee-rhino-mcp/rhino-export-stl.md

WHAT IT DOES

What rhino_export_stl does on Rhino

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

RISK

Why rhino_export_stl is rated Medium

The tool creates or modifies files (STL format) on disk. While file creation/export is a write operation that has side effects, it is reversible—files can be deleted or overwritten. This makes it Write rather than Destructive.

From the tool's definition Tool description explicitly states 'Export meshes to an ASCII STL file.' Export operations create/write files to the filesystem, which are reversible actions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rhino_export_stl safely

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

rhino_export_stl Rate-limited

rhino_export_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": {
    "rhino_export_stl": {
      "limits": [
        {
          "counter": "rhino_export_stl_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 Rhino, apply this rule, and every rhino_export_stl call is checked against it from then on.

FAQ

Questions about rhino_export_stl

What does the rhino_export_stl tool do? +

Export meshes to an ASCII STL file. It is categorised as a Write tool in the Rhino MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rhino_export_stl? +

Register the Rhino MCP server in PolicyLayer and add a rule for rhino_export_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 Rhino. Nothing to install.

What risk level is rhino_export_stl? +

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

Can I rate-limit rhino_export_stl? +

Yes. Add a rate_limit block to the rhino_export_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 rhino_export_stl completely? +

Set action: deny in the PolicyLayer policy for rhino_export_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 rhino_export_stl? +

rhino_export_stl is provided by the Rhino MCP server (easehee/rhino-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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