email_set_flags

THE RISK

Medium Risk

Why email_set_flags needs a policy

Setting or removing email flags is a reversible modification operation that changes message state (read/unread, starred/unstarred). While it affects email metadata, it does not delete or destroy data, nor does it execute arbitrary code or move money. It therefore falls under Write category.

From the tool's definition Tool description states 'Set or remove flags on messages' with examples like '\Seen (read)' and '\Flagged (starred)'. This modifies message metadata flags without deleting content.

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

POLICY

How to control email_set_flags

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "email_set_flags": {
      "limits": [
        {
          "counter": "email_set_flags_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

email_set_flags 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.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Apple Shortcuts tools

Destructive cancel_runway_task Cancel a pending/running task or delete a completed task. Saves credits if cancelled befor Destructive delete_custom_voice Delete a custom voice by ID. This is permanent and cannot be undone. Destructive delete_email Delete or move an email to trash. Destructive delete_event Delete a calendar event. Destructive delete_file Delete a file or folder from OneDrive. Destructive delete_library_item Delete a file or folder from a SharePoint document library. Destructive delete_list_item Delete an item from a SharePoint list. Destructive opus_cancel_scheduled_post Cancel a scheduled social post BEFORE its publishAt time.

All 423 Apple Shortcuts tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about email_set_flags

What does the email_set_flags tool do? +

Set or remove flags on messages. Common flags: \\Seen (read), \\Flagged (starred). It is categorised as a Write tool in the Apple Shortcuts MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on email_set_flags? +

Register the Apple Shortcuts MCP server in PolicyLayer and add a rule for email_set_flags: 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 Apple Shortcuts. Nothing to install.

What risk level is email_set_flags? +

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

Can I rate-limit email_set_flags? +

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

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

email_set_flags is provided by the Apple Shortcuts MCP server (@mindstone/mcp-server-apple-shortcuts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Apple Shortcuts tool call.

Start from Apple Shortcuts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →