list_prefabs

List all .prefab files in the project. Filter by name or path

SERVERSbox SOURCEsbox-mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/sbox/list-prefabs.md

WHAT IT DOES

What list_prefabs does on Sbox

AI agents call list_prefabs to retrieve information from Sbox without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_prefabs is rated Low

This tool retrieves and filters existing prefab files without creating, modifying, deleting, or executing any operations. It is purely informational and poses minimal risk if misused by an AI agent, as it cannot alter game state or cause unintended effects.

From the tool's definition Tool name 'list_prefabs' and description 'List all .prefab files in the project. Filter by name or path' indicate a query/retrieval operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

list_prefabs Allowed

list_prefabs is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_prefabs": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Sbox, apply this rule, and every list_prefabs call is checked against it from then on.

FAQ

Questions about list_prefabs

What does the list_prefabs tool do? +

List all .prefab files in the project. Filter by name or path. It is categorised as a Read tool in the Sbox MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_prefabs? +

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

list_prefabs is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_prefabs? +

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

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

list_prefabs 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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