# create_calendar_event

Creates an event in the Mac's Calendar app (Calendar.app). Requires title, start_date, end_date. Optionally invite attendees by email (CalDAV/Exchange calendars only). For Microsoft 365 use m365_create_event instead.

Agent View of the PolicyLayer registry record for `create_calendar_event`. HTML page: https://policylayer.com/tools/com-local-mcp-local-mcp/create-calendar-event

## Facts

- Tool: `create_calendar_event`
- Server: Local (`local-mcp`) — https://policylayer.com/tools/com-local-mcp-local-mcp.md
- Install: `npx -y local-mcp`
- Homepage: https://github.com/lanchuske/local-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 9 (3 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `notes` | string | no | Event notes (optional) |
| `title` | string | yes | Event title |
| `confirm` | boolean | no | Must be true to create the event |
| `calendar` | string | no | Calendar name to match (optional, alternative to calendar_id) |
| `end_date` | string | yes | ISO 8601 datetime |
| `location` | string | no | Location (optional) |
| `attendees` | array | no | List of email addresses to invite (optional, CalDAV/Exchange only) |
| `start_date` | string | yes | ISO 8601 datetime (YYYY-MM-DDTHH:MM:SS) |
| `calendar_id` | string | no | Calendar UUID from list_calendar_names (optional, defaults to default calendar) |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "create_calendar_event",
    "arguments": {
      "title": "<title>",
      "end_date": "<end_date>",
      "start_date": "<start_date>"
    }
  }
}
```

## Why create_calendar_event is rated Medium

This tool creates new calendar data reversibly. It is a Write operation as it adds data to the user's calendar without deletion or irreversible side effects. Severity is medium because calendar event creation could be misused to spam attendees with invitations, create misleading meetings, or interfere with someone's schedule, but the action is reversible (events can be deleted).

From the tool's own definition: "Tool name 'create_calendar_event' and description states it 'Creates an event in the Mac's Calendar app' with required title, start_date, end_date parameters and optional attendee invitations."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Local:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_calendar_event": {
      "limits": [
        {
          "counter": "create_calendar_event_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Local (233)

- `delete_calendar_event` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-calendar-event.md
- `delete_reminder` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-reminder.md
- `delete_reminder_list` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-reminder-list.md
- `m365_delete_event` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/m365-delete-event.md
- `onedrive_delete_file` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/onedrive-delete-file.md
- `recipe_delete` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/recipe-delete.md
- `chrome_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-click.md
- `chrome_evaluate_js` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-evaluate-js.md
- `chrome_fill_form` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-fill-form.md
- `chrome_go_back` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-go-back.md
- `chrome_navigate` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-navigate.md
- `chrome_type` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-type.md
- `chrome_wait_for` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-wait-for.md
- `nordvpn_diagnose` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/nordvpn-diagnose.md
- `notion_open_page` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/notion-open-page.md
- `recipe_run` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/recipe-run.md
- `run_diagnostics` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/run-diagnostics.md
- `run_terminal_command` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/run-terminal-command.md
- `safari_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-click.md
- `safari_evaluate_js` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-evaluate-js.md
- `safari_fill_form` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-fill-form.md
- `safari_go_back` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-go-back.md
- `safari_navigate` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-navigate.md
- `safari_query_selector_all` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-query-selector-all.md
- `safari_type` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-type.md
- `safari_wait_for` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-wait-for.md
- `screen_record_start` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/screen-record-start.md
- `screen_record_stop` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/screen-record-stop.md
- `setup_install` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/setup-install.md
- `ui_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/ui-click.md
- …and 203 more: https://policylayer.com/tools/com-local-mcp-local-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-local-mcp-local-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-local-mcp-local-mcp