set_property

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/set-property.md

WHAT IT DOES

What set_property does on Sbox

AI agents use set_property 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 set_property is rated Medium

This tool modifies game component properties and persists them to disk (survives save+reload cycles). It is reversible (properties can be changed again), so it qualifies as Write rather than Destructive.

From the tool's definition Tool description states it can 'Set a property value on a component (editor mode), and PERSIST it (survives save+reload)'. This is a modification operation that changes game engine state and data in a permanent way.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

set_property Rate-limited

set_property 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": {
    "set_property": {
      "limits": [
        {
          "counter": "set_property_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 set_property call is checked against it from then on.

FAQ

Questions about set_property

What does the set_property tool do? +

Set a property value on a component (editor mode), and PERSIST it (survives save+reload). Handles primitives, enums, value types (Color/Vector3 as comma strings), AND references: pass an asset PATH for Model/Material/Texture/SoundEvent props, or a GameObject GUID for GameObject/Component-typed props (resolved like set_component_reference). Returns success=false with a clear error if a path/GUID can. 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 set_property? +

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

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

Can I rate-limit set_property? +

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

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

set_property 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.

KEEP EXPLORING

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