apple_calendar_action

Use the local Apple Calendar app on macOS to list and manage events.

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/apple-calendar-action.md

WHAT IT DOES

What apple_calendar_action does on CoWork OS

AI agents use apple_calendar_action to create or update resources in CoWork OS, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CoWork OS environment.

RISK

Why apple_calendar_action is rated Medium

The tool performs reversible operations on calendar data (creating and modifying events). While it may support deletion, the primary risk is modification of calendar state. An AI agent could inadvertently create duplicate events, modify important meetings, or change event details, causing user confusion or missed appointments.

From the tool's definition Tool description states it can 'list and manage events' on Apple Calendar. 'Manage' implies creating, modifying, or deleting calendar events.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs apple_calendar_action safely

PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For apple_calendar_action, this is the rule to start with:

apple_calendar_action Rate-limited

apple_calendar_action 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.

View as policy code

policy.json

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

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every apple_calendar_action call is checked against it from then on.

FAQ

Questions about apple_calendar_action

What does the apple_calendar_action tool do? +

Use the local Apple Calendar app on macOS to list and manage events. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on apple_calendar_action? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for apple_calendar_action: 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 CoWork OS. Nothing to install.

What risk level is apple_calendar_action? +

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

Can I rate-limit apple_calendar_action? +

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

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

apple_calendar_action is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on CoWork OS, and thousands of servers like it.

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All 342 CoWork OS tools →

Across the catalogue

calendar_create_event on Apple Apps MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →