linear_extrude · 3D MCP Server MCP: Risk & Policy

WHAT IT DOES

What linear_extrude does on 3D MCP Server

AI agents use linear_extrude 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 linear_extrude needs a policy

This tool creates/modifies 3D geometry by extruding a 2D shape into a 3D model. It is a reversible creative operation (the object can be removed or replaced), placing it in the Write category. Misuse has minimal blast radius as it only affects the in-memory or file-based 3D model being constructed.

From the tool's definition Extrude a 2D shape (circle, square, polygon) into 3D

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

linear_extrude Rate-limited

linear_extrude 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": {
    "linear_extrude": {
      "limits": [
        {
          "counter": "linear_extrude_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 linear_extrude

What does the linear_extrude tool do? +

Extrude a 2D shape (circle, square, polygon) into 3D. 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 linear_extrude? +

Register the 3D MCP Server MCP server in PolicyLayer and add a rule for linear_extrude: 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 linear_extrude? +

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

Can I rate-limit linear_extrude? +

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

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

linear_extrude 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.