// SCAN REPORT

macOS Calendar MCP Server

8 tools. 4 can modify or destroy data without limits.

1 destructive tool with no built-in limits. Policy required.

Last updated: 12 Jun 2026

4 can modify or destroy data

4 read-only

8 tools total

Community server · catalogue entry verified 12/06/2026

How to control macOS Calendar MCP Server ↓

TOOL MAP

What macOS Calendar MCP Server exposes to your agents

Read (4) Write / Execute (3) Destructive / Financial (1)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

Critical Risk

The most dangerous macOS Calendar MCP Server tools

Destructive · High delete-events-by-keyword The tool permanently deletes calendar events without the ability to undo the action through the tool interface itself. Write · Medium create-batch-events The tool creates calendar entries in bulk, which is a Write-category action (creates/modifies data reversibly). Write · Medium create-event This tool creates new calendar events, which is a reversible modification of calendar data. Write · Medium fix-event-times This tool modifies existing calendar events by updating their time fields (correcting midnight times to proper times).

4 of macOS Calendar MCP Server's 8 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control macOS Calendar MCP Server

PolicyLayer is an MCP gateway — it sits between your AI agents and macOS Calendar MCP Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Deny destructive operations

{
  "delete-events-by-keyword": {
    "deny_if": [
      {
        "conditions": [],
        "on_deny": "Blocked by default. Requires approval."
      }
    ]
  }
}

Destructive tools should never be available to autonomous agents without human approval.

Rate limit write operations

{
  "fix-event-times": {
    "limits": [
      {
        "counter": "fix-event-times_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "list-calendars": {
    "limits": [
      {
        "counter": "list-calendars_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register macOS Calendar MCP Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON MACOS CALENDAR →

Free to start. No card required.

FULL CATALOGUE

All 8 macOS Calendar MCP Server tools

DESTRUCTIVE 1 tools

Destructive delete-events-by-keyword 根据关键词删除事件

WRITE 3 tools

Write fix-event-times 修正错误的事件时间（从凌晨修正到正确时间） Write create-batch-events 批量创建事件 Write create-event 在macOS日历中创建新事件

READ 4 tools

Read list-calendars 列出所有macOS日历 Read list-today-events 列出今天的事件 Read list-week-events 列出指定周的事件 Read search-events 搜索事件

EXPLORE

Related servers

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Questions about macOS Calendar MCP Server

Can an AI agent delete data through the macOS Calendar MCP Server MCP server? +

Yes. The macOS Calendar MCP Server server exposes 1 destructive tools including delete-events-by-keyword. These permanently remove resources with no undo. PolicyLayer blocks destructive tools by default so they never reach the upstream server.

How do I prevent bulk modifications through macOS Calendar MCP Server? +

The macOS Calendar MCP Server server has 3 write tools including fix-event-times, create-batch-events, create-event. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach macOS Calendar MCP Server.

How many tools does the macOS Calendar MCP Server MCP server expose? +

8 tools across 3 categories: Destructive, Read, Write. 4 are read-only. 4 can modify, create, or delete data.

How do I enforce a policy on macOS Calendar MCP Server? +

Register the macOS Calendar MCP Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every macOS Calendar MCP Server tool call.

Deterministic rules across all 8 macOS Calendar MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON MACOS CALENDAR →

Free to start. No card required.

8 macOS Calendar MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.