create_box · Hardware MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_box does on Hardware MCP Server

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

WHY IT NEEDS A POLICY

Why create_box needs a policy

This tool creates a new geometric object (a box/cube) in a CAD environment. It is a Write operation as it generates new data/model state. It is reversible (the part can be deleted or overwritten), not destructive. The blast radius is low since it only affects local CAD model state, not external systems or data.

From the tool's definition 'Create a cube with dimensions x_length, y_length and z_length' — creates a new CAD part/object

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_box Rate-limited

create_box 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_box": {
      "limits": [
        {
          "counter": "create_box_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 Hardware MCP Server, so you can run agents against it safely.

FAQ

Questions about create_box

What does the create_box tool do? +

Create a cube with dimensions x_length, y_length and z_length. It is categorised as a Write tool in the Hardware 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_box? +

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

What risk level is create_box? +

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

Can I rate-limit create_box? +

Yes. Add a rate_limit block to the create_box 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_box completely? +

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

create_box is provided by the Hardware MCP Server MCP server (thefloatingstring/mcp-for-hardware). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.