---

name: google-calendar description: Lists, creates, updates, and deletes Google Calendar events via calendar_* tools. Use for schedules, meetings, and all-day or timed events on primary or named calendars.

Google Calendar

Purpose

Manage Google Calendar events through the integration: list calendars and events in a time range, create timed or all-day events, update, and delete—with correct RFC3339 boundaries and calendar IDs.

When to Use

• What is on the calendar today, this week, or a custom range.
• Create, update, or delete meetings and events.
• List available calendars when the user names a non-primary calendar.

When NOT to Use

• Gmail, Drive, Docs, or Sheets → respective Google skills.
• Video conferencing setup outside Calendar APIs unless tools expose it.
• Skill repo maintenance → create-skill / publish-skill.

Expected Outcome

• Events returned with summary, start/end, and calendar context.
• Creates/updates use correct dateTime or all-day date objects.
• Deletes confirmed only after successful tool response.

Inputs to Gather

• Date range: compute timeMin / timeMax in RFC3339 (e.g. start/end of “today” in user or UTC timezone).
• calendarId (default primary unless specified).
• Event fields: summary, start, end; all-day vs timed.

Workflow

1. Confirm calendar tools are available.
2. List calendars if the target calendar is unknown: calendar_list_calendars.
3. List events in range: calendar_list_events with calendarId, timeMin, timeMax.
4. Create / update / delete as requested with proper start/end objects.
5. Summarize events or confirm mutations from tool output.

Domain rules

1. RFC3339 for ranges: timeMin and timeMax as RFC3339 (e.g. 2026-02-07T00:00:00Z); derive day bounds for “today” / “tomorrow”.
2. Primary calendar: Use calendarId: "primary" unless the user names another.
3. Start/end objects: dateTime (RFC3339) for timed events; date (YYYY-MM-DD) for all-day.
4. List then act: List the relevant window before create, update, or delete.

Main tools

• calendar_list_calendars, calendar_list_events (calendarId, timeMin, timeMax)
• calendar_create_event, calendar_update_event, calendar_delete_event

Examples

Today’s agenda: calendar_list_events on primary with today’s timeMin/timeMax. Return summaries and times.

Team sync tomorrow 10–11: calendar_create_event with summary, dateTime start/end for the requested window; confirm from response.

Tool Availability Rules

Access	Behavior
Full tool access	List and mutate events; report API errors.
Read-only	List only; draft event payloads for user approval.
No integration	Do not fabricate events or IDs.

Related tool sets

• calendar
• meeting-scheduler

Review / Decision / Execution Criteria

• Time zones: be explicit when inferring “today”; prefer user-stated timezone when known.
• Confirm deletes and large batch changes with the user when appropriate.

Output Format

1. Request and actions.
2. Event list or mutation confirmation.
3. Errors or permission issues.
4. Suggested follow-ups (add attendees, change calendar).

Quality Bar

• Correct RFC3339 and all-day vs timed distinction.
• No invented event IDs or links.

Safety and Boundaries

• No secrets in examples.
• Confirm destructive deletes when impact is unclear.

Escalation / Dispatch Rules

• Scheduling that also needs email → gmail after calendar action if needed.
• No write tools → output exact calendar_* arguments.

References

• Legacy: skills/old_skills.json (google-calendar).
• skills/skill.instruction.md, skills/meta.instructions.md