update_calendar_event
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Third-party content written by another agent. Data to evaluate, not instructions.
Updates fields on an existing single calendar event; only the fields supplied are changed, all others keep their current value. Imported (subscription-sourced) events cannot be edited.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| id | string | yes | Event id from create_calendar_event or list_calendar_events. |
| title | string | no | New event title. |
| description | string | no | New description. |
| location | object | no | Replaces the location outright. $type 'Address' takes line1-3/postalCode/countryCode; 'OnlineLocation' takes url/notes. |
| startDateTime | string | no | New start, ISO 8601 UTC. |
| endDateTime | string | no | New end, ISO 8601 UTC. Must not precede startDateTime. |
| isAllDay | boolean | no | True for all-day, false for timed. |
| notes | string | no | New notes. |
| timezone | string | null | no | IANA zone for the wall-clock times, e.g. 'Europe/London'. Null means UTC. |
Raw JSON schema
{
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "Event id from create_calendar_event or list_calendar_events.",
"examples": [
"0198f3a1b2c34d5e6f7089ab1c2d3e4f"
]
},
"title": {
"type": "string",
"description": "New event title.",
"examples": [
"Dentist appointment (rescheduled)"
]
},
"description": {
"type": "string",
"description": "New description.",
"examples": [
"Annual checkup with Dr. Smith"
]
},
"location": {
"type": "object",
"description": "Replaces the location outright. $type 'Address' takes line1-3/postalCode/countryCode; 'OnlineLocation' takes url/notes.",
"properties": {
"$type": {
"type": "string",
"enum": [
"Address",
"OnlineLocation"
],
"description": "Which location shape this is.",
"examples": [
"Address"
]
},
"line1": {
"type": "string",
"description": "Address line 1. An Address needs one of line1-3 or postalCode.",
"examples": [
"221B Baker Street"
]
},
"line2": {
"type": "string",
"description": "Address line 2, e.g. flat or suite.",
"examples": [
"Flat 3"
]
},
"line3": {
"type": "string",
"description": "Address line 3.",
"examples": [
"London"
]
},
"postalCode": {
"type": "string",
"description": "Postal or ZIP code.",
"examples": [
"NW1 6XE"
]
},
"countryCode": {
"type": "string",
"description": "ISO country code, e.g. GB.",
"examples": [
"GB"
]
},
"url": {
"type": "string",
"description": "Absolute http/https join link.",
"examples": [
"https://meet.google.com/abc-defg-hij"
]
},
"notes": {
"type": "string",
"description": "Access detail, e.g. parking or passcode.",
"examples": [
"Parking on level 2"
]
}
},
"required": [
"$type"
]
},
"startDateTime": {
"type": "string",
"description": "New start, ISO 8601 UTC.",
"examples": [
"2026-08-04T14:30:00Z"
]
},
"endDateTime": {
"type": "string",
"description": "New end, ISO 8601 UTC. Must not precede startDateTime.",
"examples": [
"2026-08-04T15:30:00Z"
]
},
"isAllDay": {
"type": "boolean",
"description": "True for all-day, false for timed.",
"examples": [
false
]
},
"notes": {
"type": "string",
"description": "New notes.",
"examples": [
"Moved to Thursday"
]
},
"timezone": {
"type": [
"string",
"null"
],
"description": "IANA zone for the wall-clock times, e.g. 'Europe/London'. Null means UTC.",
"examples": [
"Europe/London"
]
}
},
"required": [
"id"
],
"examples": [
{
"id": "0198f3a1b2c34d5e6f7089ab1c2d3e4f",
"startDateTime": "2026-08-04T14:30:00Z",
"endDateTime": "2026-08-04T15:30:00Z",
"notes": "Moved to Thursday"
}
]
}