create_polyhedron · 3D MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_polyhedron does on 3D MCP Server

AI agents use create_polyhedron to create or update resources in 3D MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 3D MCP Server environment.

WHY IT NEEDS A POLICY

Why create_polyhedron needs a policy

This tool creates new geometric objects (polyhedra) in the 3D model space. It is a Write operation because it creates or modifies data reversibly—polyhedra can be deleted or modified afterwards using sibling tools like 'remove_object' or 'custom_scad'. It does not execute arbitrary code (Execute), destroy data (Destructive), or move money (Financial).

From the tool's definition Tool creates custom polyhedron from vertices and faces, adding new 3D model data. Description indicates data creation without deletion or irreversible modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_polyhedron Rate-limited

create_polyhedron 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": {
    "create_polyhedron": {
      "limits": [
        {
          "counter": "create_polyhedron_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 3D MCP Server, so you can run agents against it safely.

FAQ

Questions about create_polyhedron

What does the create_polyhedron tool do? +

Create a custom polyhedron from vertices and faces. It is categorised as a Write tool in the 3D 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 create_polyhedron? +

Register the 3D MCP Server MCP server in PolicyLayer and add a rule for create_polyhedron: 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 3D MCP Server. Nothing to install.

What risk level is create_polyhedron? +

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

Can I rate-limit create_polyhedron? +

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

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

create_polyhedron is provided by the 3D MCP Server MCP server (jagjerez-org/3d-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.