AI agents call list_reminder_lists to retrieve information from Apple Reminders MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query operation that retrieves information about existing reminder lists. It has no side effects, cannot modify or delete data, and presents minimal risk if called by an AI agent. The blast radius is limited to information disclosure about which reminder lists exist on the system.
From the tool's definition 'Get all available reminder lists' - retrieves a list of reminder lists without modifying any data. No creation, deletion, or modification occurs.
Documented attack patterns abuse exactly the kind of access list_reminder_lists gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple Reminders MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_reminder_lists:
{
"version": "1",
"default": "deny",
"tools": {
"list_reminder_lists": {}
}
}list_reminder_lists is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all available reminder lists. It is categorised as a Read tool in the Apple Reminders MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Apple Reminders MCP Server MCP server in PolicyLayer and add a rule for list_reminder_lists: 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 Reminders MCP Server. Nothing to install.
list_reminder_lists is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_reminder_lists 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 list_reminder_lists. 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.
list_reminder_lists is provided by the Apple Reminders MCP Server MCP server (shreyanshjain05/apple_reminder_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Apple Reminders MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
4 Apple Reminders MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.