assign_model

Set a 3D model on a GameObject

SERVERSbox SOURCEsbox-mcp-server

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/sbox/assign-model.md

WHAT IT DOES

What assign_model does on Sbox

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

RISK

Why assign_model is rated Medium

This tool creates or modifies game object state (assigning a 3D model) without permanently deleting data or executing arbitrary code. It fits the Write category because the change is reversible — a different model can be assigned later.

From the tool's definition Tool description explicitly states 'Set a 3D model on a GameObject' — this modifies a game object's properties by assigning/changing a model asset, which is a reversible write operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs assign_model safely

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

assign_model Rate-limited

assign_model 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": {
    "assign_model": {
      "limits": [
        {
          "counter": "assign_model_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 Sbox, apply this rule, and every assign_model call is checked against it from then on.

FAQ

Questions about assign_model

What does the assign_model tool do? +

Set a 3D model on a GameObject. It is categorised as a Write tool in the Sbox MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on assign_model? +

Register the Sbox MCP server in PolicyLayer and add a rule for assign_model: 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 Sbox. Nothing to install.

What risk level is assign_model? +

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

Can I rate-limit assign_model? +

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

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

assign_model is provided by the Sbox MCP server (sbox-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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