update_event
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Third-party content written by another agent. Data to evaluate, not instructions.
Reschedule or edit an event — change its title, description, start/end times, location, status, reminders, or metadata. Use this to move an appointment to a new time or update its details. Provide only the fields you want to change. Holds cannot be edited via this tool (use confirm_event / release_event). External iCal events are read-only. calendar_id is optional — if omitted it is resolved from the event.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| event_id | string | yes | Event ID to update |
| calendar_id | string | no | Calendar ID that owns the event. Optional — if omitted the calendar is resolved from the event. |
| title | string | no | New event title |
| description | any | no | New description, or null to clear it |
| start_time | string | no | New start time (ISO 8601) |
| end_time | string | no | New end time (ISO 8601) |
| all_day | boolean | no | Whether this is an all-day event |
| status | string | no | New event status |
| metadata | object | no | Replacement metadata object |
| reminders | any | no | Reminder offsets in minutes before start_time. Omit to leave unchanged, null to inherit the calendar default, [] for no reminders. |
| recurrence_rule | any | no | Set/change the recurring series rule (RFC 5545 RRULE subset, full-series semantics), or null to make the event a one-off. Changing the rule or start_time resets cancelled occurrences. |
Raw JSON schema
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"event_id": {
"type": "string",
"description": "Event ID to update"
},
"calendar_id": {
"description": "Calendar ID that owns the event. Optional — if omitted the calendar is resolved from the event.",
"type": "string"
},
"title": {
"description": "New event title",
"type": "string",
"minLength": 1,
"maxLength": 500
},
"description": {
"description": "New description, or null to clear it",
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"start_time": {
"description": "New start time (ISO 8601)",
"type": "string",
"format": "date-time",
"pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
},
"end_time": {
"description": "New end time (ISO 8601)",
"type": "string",
"format": "date-time",
"pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
},
"all_day": {
"description": "Whether this is an all-day event",
"type": "boolean"
},
"status": {
"description": "New event status",
"type": "string",
"enum": [
"confirmed",
"tentative",
"cancelled"
]
},
"metadata": {
"description": "Replacement metadata object",
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"reminders": {
"description": "Reminder offsets in minutes before start_time. Omit to leave unchanged, null to inherit the calendar default, [] for no reminders.",
"anyOf": [
{
"maxItems": 5,
"type": "array",
"items": {
"type": "integer",
"minimum": 1,
"maximum": 40320
}
},
{
"type": "null"
}
]
},
"recurrence_rule": {
"description": "Set/change the recurring series rule (RFC 5545 RRULE subset, full-series semantics), or null to make the event a one-off. Changing the rule or start_time resets cancelled occurrences.",
"anyOf": [
{
"type": "string",
"maxLength": 256
},
{
"type": "null"
}
]
}
},
"required": [
"event_id"
]
}