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calendar-delete-event

Remove calendar events by specifying the event ID and calendar ID to manage schedules and clean up outdated appointments.

Instructions

Delete a calendar event

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventIdYesEvent ID
calendarIdNoCalendar ID - Available options: 'primary' (Primary Calendar)primary

Implementation Reference

  • The handler function that performs the actual deletion of a calendar event using the Google Calendar API. It takes eventId and optional calendarId, deletes the event, and returns a success or error message.
    export async function deleteEvent(
      params: z.infer<ReturnType<typeof deleteEventSchema>>
    ) {
      try {
        const auth = createCalendarAuth();
        const calendar = google.calendar({ version: "v3", auth });
    
        await calendar.events.delete({
          calendarId: params.calendarId,
          eventId: params.eventId,
          sendUpdates: "all",
        });
    
        return {
          content: [
            {
              type: "text" as const,
              text: `# Event Deleted Successfully ✅\n\nEvent \`${params.eventId}\` has been deleted from your calendar.`,
            },
          ],
        };
      } catch (error) {
        return {
          content: [
            {
              type: "text" as const,
              text: `Error deleting event: ${
                error instanceof Error ? error.message : String(error)
              }`,
            },
          ],
        };
      }
    }
  • Zod schema defining the input parameters for the delete event tool: eventId (required) and calendarId (optional, defaults to 'primary').
    export const deleteEventSchema = () =>
      z.object({
        eventId: z.string().describe("Event ID"),
        calendarId: z
          .string()
          .default("primary")
          .describe(getCalendarDescription()),
      });
  • src/index.ts:251-258 (registration)
    Registration of the 'calendar-delete-event' tool on the MCP server, linking the name, description, schema, and handler function.
    server.tool(
      "calendar-delete-event",
      "Delete a calendar event",
      deleteEventSchema().shape,
      async (params) => {
        return await deleteEvent(params);
      }
    );
Behavior2/5

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

With no annotations provided, the description carries full burden but only states the action without behavioral details. It doesn't disclose whether deletion is permanent, requires specific permissions, has confirmation prompts, or affects related calendar data, leaving critical mutation behavior opaque.

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, direct sentence with zero wasted words. It's front-loaded with the core action and resource, making it highly efficient and easy to parse at a glance.

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

Completeness2/5

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

For a destructive mutation tool with no annotations and no output schema, the description is insufficient. It lacks details on behavior, error conditions, return values, or safety considerations, leaving significant gaps for agent decision-making.

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 description coverage is 100%, so parameters are documented in the schema. The description adds no additional meaning about 'eventId' or 'calendarId' beyond what's in the schema, meeting the baseline for high coverage but not enhancing understanding.

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

Purpose4/5

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

The description clearly states the verb ('Delete') and resource ('a calendar event'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'calendar-update-event' or 'calendar-get-event' beyond the obvious action difference, missing specific scope distinctions.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives. There's no mention of prerequisites (e.g., needing an existing event), exclusions, or comparison with siblings like 'calendar-update-event' for modifying instead of deleting.

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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