create_material

Create a new material file (.vmat) with a shader and properties like color, roughness, metallic, texture

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/create-material.md

WHAT IT DOES

What create_material does on Sbox

AI agents use create_material 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 create_material is rated Medium

This tool creates new material assets for the s&box game engine. Material files are game data that can be edited or deleted, making this a Write operation (reversible creation). There is no code execution, deletion of existing data, or financial impact.

From the tool's definition Tool creates a new material file (.vmat) with shader and properties. Keywords 'Create a new material file' indicate file creation, which is reversible modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_material 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 create_material, this is the rule to start with:

create_material Rate-limited

create_material 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_material": {
      "limits": [
        {
          "counter": "create_material_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 create_material call is checked against it from then on.

FAQ

Questions about create_material

What does the create_material tool do? +

Create a new material file (.vmat) with a shader and properties like color, roughness, metallic, texture. 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 create_material? +

Register the Sbox MCP server in PolicyLayer and add a rule for create_material: 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 create_material? +

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

Can I rate-limit create_material? +

Yes. Add a rate_limit block to the create_material 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_material completely? +

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

create_material 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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