create_meta_progression

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-meta-progression.md

WHAT IT DOES

What create_meta_progression does on Sbox

AI agents use create_meta_progression 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_meta_progression is rated Medium

Creates and modifies persistent game progression data with file-system writes; reversible through save-file edits.

From the tool's definition persistent meta-currency, unlock-flag dictionary saved to FileSystem.Data JSON, dirty-flag autosave

Attacks that exploit this kind of access

RECOMMENDED RULE

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

create_meta_progression Rate-limited

create_meta_progression 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_meta_progression": {
      "limits": [
        {
          "counter": "create_meta_progression_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_meta_progression call is checked against it from then on.

FAQ

Questions about create_meta_progression

What does the create_meta_progression tool do? +

Generate a between-runs roguelite meta-progression component (sealed, owner-only): persistent meta-currency + an unlock-flag dictionary saved to FileSystem.Data JSON (dirty-flag autosave + OnDestroy, the create_save_system shape). API: Grant(long), TrySpend(long) -> bool, Unlock(key) (idempotent — the static OnUnlocked(key) event fires only on the FIRST unlock, and unlocks write through to disk immediately), IsUnlocked(key) -> bool, and the run-end seam BankRun(int earned) which converts a finished run. 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_meta_progression? +

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

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

Can I rate-limit create_meta_progression? +

Yes. Add a rate_limit block to the create_meta_progression 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_meta_progression completely? +

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

create_meta_progression 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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