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Update Calendar Event

update_calendar_event
Idempotent

Update one calendar event by rescheduling it, changing status, reassigning it, or storing metadata.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idNoCompatibility alias for eventId.
postIdNoCompatibility alias when the calendar event maps directly to a scheduled post.
statusNoUpdated event status.
eventIdNoCalendar event ID or backing scheduled post ID.
team_idNoTeam ID to operate in team scope. Get available teams with list_teams. If omitted, uses personal scope.
metadataNoOptional event metadata patch.
assigneeIdNoOptional assignee user ID.
scheduledAtNoUpdated ISO 8601 schedule time for the event.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • removedInput schema / anyOf
      Removed value: -[
-  {
-    "required": [
-      "eventId"
-    ]
-  },
-  {
-    "required": [
-      "id"
-    ]
-  },
-  {
-    "required": [
-      "postId"
-    ]
-  }
-]
  2. First observed

TDQS

A3.8/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already convey readOnlyHint=false, idempotentHint=true, and destructiveHint=false. The description adds context about update categories but does not disclose deeper behavioral traits like partial update semantics or effect on existing event data. This falls in line with the baseline for tools with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence that lists the purpose and key operations without redundancy. It is appropriately sized for the tool's complexity and wastes no words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the rich parameter schema and annotations, the description covers the core intent well. It does not address return values (no output schema), but the absence of output schema and the presence of comprehensive parameter descriptions make the description adequate for an update tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema fully documents all parameters. The description merely summarizes categories (rescheduling, status, assignee, metadata) that are already present in the schema, adding no new meaning beyond a high-level grouping.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action 'Update' with the specific resource 'one calendar event' and enumerates the types of updates: rescheduling, changing status, reassigning, storing metadata. The word 'one' distinguishes it from sibling tools like bulk_update_calendar_events, making the purpose unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for single event updates but does not explicitly provide when-to-use vs alternatives. It lacks a direct reference to bulk_update_calendar_events or other sibling tools, so the guidance is only implicit through the word 'one'.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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