set_runtime_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-runtime-property.md

WHAT IT DOES

What set_runtime_property does on Sbox

AI agents use set_runtime_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_runtime_property is rated Medium

Modifies runtime game state temporarily; changes are discarded when play mode stops.

From the tool's definition Set a component property value during play mode — tweak values live

Attacks that exploit this kind of access

RECOMMENDED RULE

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

set_runtime_property Rate-limited

set_runtime_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_runtime_property": {
      "limits": [
        {
          "counter": "set_runtime_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_runtime_property call is checked against it from then on.

FAQ

Questions about set_runtime_property

What does the set_runtime_property tool do? +

Set a component property value during play mode — tweak values live while the game runs. Errors if the game is not playing (start_play first). Returns { set, id, component, property, value } like set_property; read it back with get_runtime_property. Runtime changes are DISCARDED when play mode stops — use set_property in edit mode to persist. 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_runtime_property? +

Register the Sbox MCP server in PolicyLayer and add a rule for set_runtime_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_runtime_property? +

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

Can I rate-limit set_runtime_property? +

Yes. Add a rate_limit block to the set_runtime_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_runtime_property completely? +

Set action: deny in the PolicyLayer policy for set_runtime_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_runtime_property? +

set_runtime_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.

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