cleanup_screenshots

THE RISK

Critical Risk

Why cleanup_screenshots needs a policy

This tool deletes files (screenshots) from the filesystem. Even though they are temporary files, deletion is irreversible — once cleaned up, the screenshot data is gone. This fits the Destructive category. Severity is medium because it only affects temporary screenshot files rather than critical system or user data.

From the tool's definition Clean up old screenshots from temporary folder

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

POLICY

How to control cleanup_screenshots

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

policy.json

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

cleanup_screenshots 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 macOS Simulator MCP Server — 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

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All 28 macOS Simulator MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in macOS Simulator MCP Server → 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 cleanup_screenshots

What does the cleanup_screenshots tool do? +

Clean up old screenshots from temporary folder. It is categorised as a Destructive tool in the macOS Simulator MCP Server 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 cleanup_screenshots? +

Register the macOS Simulator MCP Server MCP server in PolicyLayer and add a rule for cleanup_screenshots: 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 macOS Simulator MCP Server. Nothing to install.

What risk level is cleanup_screenshots? +

cleanup_screenshots 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 cleanup_screenshots? +

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

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

cleanup_screenshots is provided by the macOS Simulator MCP Server MCP server (ohqay/mac-commander). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every macOS Simulator MCP Server tool call.

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

CHECK YOUR STACK →