Send a Mixmax template (snippet) to one or more recipients. IMPORTANT: Confirm with the user before sending — this sends a real email using the template content. WORKFLOW: 1. list_mixmax_snippets to find the template and its _id 2. Check the snippet body for template variables (e.g. {{first_name}...
AI agents use send_mixmax_snippet 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 creates and sends emails, which is a reversible write operation (emails can be deleted/unsent from many systems, though not universally). It does not execute arbitrary code, delete data irreversibly, or move money. However, it has high severity because sending unsolicited or malformed emails to many recipients could damage reputation, violate spam regulations, or cause operational disruption.
From the tool's definition Tool description explicitly states it 'sends a real email using the template content' to 'one or more recipients.' This is message creation/delivery with side effects—emails are sent and received.
Documented attack patterns abuse exactly the kind of access send_mixmax_snippet 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 send_mixmax_snippet:
{
"version": "1",
"default": "deny",
"tools": {
"send_mixmax_snippet": {
"limits": [
{
"counter": "send_mixmax_snippet_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}send_mixmax_snippet 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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Send a Mixmax template (snippet) to one or more recipients. IMPORTANT: Confirm with the user before sending — this sends a real email using the template content. WORKFLOW: 1. list_mixmax_snippets to find the template and its _id 2. Check the snippet body for template variables (e.g. {{first_name}}, {{company}}) 3. Confirm recipients and variable values with user 4. Call this tool with matching variables NOTE: Variables are applied to ALL recipients equally. If you need different variables per recipient, send one at a time. 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 send_mixmax_snippet: 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.
send_mixmax_snippet 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 send_mixmax_snippet 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 send_mixmax_snippet. 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.
send_mixmax_snippet 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.