folder_delete

THE RISK

Critical Risk

Why folder_delete needs a policy

Deletion is an irreversible operation that cannot be undone. In the context of a Unity project, deleting a folder could remove game assets, scripts, configurations, or other critical project data. The blast radius depends on what folder is targeted, but the capability itself represents a destructive action with no undo mechanism.

From the tool's definition Tool name is 'folder_delete' and description states 'Delete a folder from Unity project' — this irreversibly removes data from the project.

Documented attack patterns abuse exactly the kind of access folder_delete gives an agent:

POLICY

How to control folder_delete

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Server for Unity, and nothing reaches the server without passing your rules. This is the rule we recommend for folder_delete:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "folder_delete"
  ]
}

folder_delete disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register MCP Server for Unity — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Server for Unity tools

Destructive script_delete Delete a C script from Unity project Destructive shader_delete Delete a shader from Unity project Write folder_create Create a new folder in Unity project Write folder_move Move a folder to a new location in Unity project Write folder_rename Rename a folder in Unity project Write script_apply_diff Apply a unified diff to a C script Write script_create Create a new C script in Unity project Write setup_unity_bridge Install/update Unity MCP bridge scripts to a Unity project (works even if Unity server is

All 15 MCP Server for Unity tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in MCP Server for Unity → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about folder_delete

What does the folder_delete tool do? +

Delete a folder from Unity project. It is categorised as a Destructive tool in the MCP Server for Unity MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on folder_delete? +

Register the MCP Server for Unity MCP server in PolicyLayer and add a rule for folder_delete: 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 MCP Server for Unity. Nothing to install.

What risk level is folder_delete? +

folder_delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit folder_delete? +

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

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

folder_delete is provided by the MCP Server for Unity MCP server (zabaglione/mcp-server-unity). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Server for Unity tool call.

Start from MCP Server for Unity, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →