Search, create, and open reminders in Apple Reminders app
AI agents use reminders to create or update resources in Apple MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Apple MCP Server environment.
Creating reminders is a reversible write operation that modifies local application state. It does not delete data (not Destructive), execute arbitrary code (not Execute), or involve financial transactions (not Financial). While search and open are read operations, the stated 'create' capability elevates this to Write category.
From the tool's definition Tool description explicitly states 'create' reminders in Apple Reminders app, which modifies user data by adding new reminders. Also supports 'search' (Read) and 'open' (Read-like), but the capability to create reminders is the most severe action.
Documented attack patterns abuse exactly the kind of access reminders gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for reminders:
{
"version": "1",
"default": "deny",
"tools": {
"reminders": {
"limits": [
{
"counter": "reminders_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}reminders 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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Search, create, and open reminders in Apple Reminders app. It is categorised as a Write tool in the Apple MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Apple MCP Server MCP server in PolicyLayer and add a rule for reminders: 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 MCP Server. Nothing to install.
reminders 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 reminders 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 reminders. 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.
reminders is provided by the Apple MCP Server MCP server (supermemoryai/apple-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 7 Apple MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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7 Apple MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.