create_save_system

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-save-system.md

WHAT IT DOES

What create_save_system does on Sbox

AI agents use create_save_system 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_save_system is rated Medium

This tool creates and modifies save game data structures through WriteJson operations, making it primarily a Write category action. While it can delete saves on version mismatch, the core function is generating and maintaining save system components that reversibly store game state.

From the tool's definition Tool description explicitly states it 'Generate[s] a versioned save-system component' and uses 'WriteJson' operations on FileSystem.Data, creating and modifying game save files.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

create_save_system Rate-limited

create_save_system 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_save_system": {
      "limits": [
        {
          "counter": "create_save_system_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_save_system call is checked against it from then on.

FAQ

Questions about create_save_system

What does the create_save_system tool do? +

Generate a versioned save-system component: a SaveData POCO with Version bump on schema change, dirty-flag autosave on a TimeUntil timer, clamp-on-load Sanitize() for corrupt/hand-edited saves, and delete-on-version-mismatch to start fresh instead of crashing. Runs only on the owning machine (IsProxy guard). Fires static OnLoaded/OnSaved hooks for HUD and analytics. FileSystem.Data.ReadJsonOrDefault/WriteJson verified live on the current SDK. Optionally attached to an existing GameObject by GUID (after a hotload). 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_save_system? +

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

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

Can I rate-limit create_save_system? +

Yes. Add a rate_limit block to the create_save_system 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_save_system completely? +

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

create_save_system 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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