AI agents use email_save_draft to create or update resources in Apple Shortcuts — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Apple Shortcuts environment.
This tool modifies the email system state by creating a new draft artifact. While reversible (drafts can be discarded or modified), it could enable an AI agent to craft and store misleading or harmful messages, phishing attempts, or fraudulent communications if misused. The severity is medium because the actual sending is not automatic, and the action remains in draft form and thus controllable by the user.
From the tool's definition Tool description states 'Save a draft email to the Drafts folder' — this creates new data (a draft message) in a reversible manner. Drafts can be edited, deleted, or sent later, making this a write operation rather than destructive.
Documented attack patterns abuse exactly the kind of access email_save_draft gives an agent:
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_save_draft:
{
"version": "1",
"default": "deny",
"tools": {
"email_save_draft": {
"limits": [
{
"counter": "email_save_draft_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}email_save_draft 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.
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Save a draft email to the Drafts folder. 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.
Register the Apple Shortcuts MCP server in PolicyLayer and add a rule for email_save_draft: 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.
email_save_draft is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the email_save_draft 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.
Set action: deny in the PolicyLayer policy for email_save_draft. 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.
email_save_draft 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.
Start from Apple Shortcuts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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423 Apple Shortcuts tools catalogued and risk-classified — across an index of 43,000+ MCP servers.