# AddEvent MCP by usefulapi (io.usefulapi/addevent): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.usefulapi%2Faddevent/versions/latest)
- Connected to: https://addevent.usefulapi.io/mcp
- Homepage: https://usefulapi.io/addevent/
- Repository: https://github.com/m190/usefulapi-mcp
- Scoring rules: v2
- Tools: 18
- Average: 50.6 / 100 (Cloudy)
- Near-identical pairs: 1

This page shows how AddEvent MCP by usefulapi (io.usefulapi/addevent)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

## Across the server

No server-wide issues.

## Tools

- `addevent_get_calendar`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_get_calendar_subscriber`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_get_rsvp_attendee`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_list_calendar_templates`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `addevent_list_event_templates`: 46 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_list_rsvp_forms`: 46 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_list_calendars`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `addevent_list_calendar_subscribers`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: sort_by.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `addevent_list_timezones`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `addevent_update_calendar`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: weekday_begin, description, landing_page_template_id, embeddable_calendar_template_id.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: calendar_id. Name the tool or the place that returns it, or models look it up first.
- `addevent_list_events`: 51 / 100
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `addevent_get_event`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_create_event`: 54 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_update_event`: 54 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: event_id. Name the tool or the place that returns it, or models look it up first.
- `addevent_create_calendar`: 55 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `addevent_list_rsvp_attendees`: 55 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: sort_by.
  - Minor: No `required` list, so every argument is optional.
- `addevent_update_rsvp_attendee`: 63 / 100
  - Minor: Arguments without a description: attending.
  - Minor: Required identifiers whose description does not say where the value comes from: attendee_id. Name the tool or the place that returns it, or models look it up first.
- `addevent_create_rsvp_attendee`: 65 / 100
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: event_id. Name the tool or the place that returns it, or models look it up first.

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