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Circle MCP Server

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Create Event

create_event
Destructive

Creates a Circle community event with schedule, ticketing, location, and invite details. Requires confirm=true to apply this state-changing action for the user.

Instructions

Create Event. Changes community state and requires confirm=true for the user-requested action.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventNo
accountNoNamed private Circle account; selects credentials, not a remote community ID.
confirmNoSet true only when the user asked for exactly this action.
payloadNoComplete JSON request body instead of body flags. Supports nested Tiptap, maps and nullable values.
space_idNo
payload_fileNoRegular local JSON body file, at most 5 MB. Cannot be mixed with body flags or payload.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed10 schema fields changedv3.0.1
    • addedInput schema / $defs
      Added value: +{
+  "event": {
+    "properties": {
+      "attendee_invite_attributes": {
+        "properties": {
+          "invited_cohost_ids": {
+            "items": {
+              "type": "integer"
+            },
+            "type": "array"
+          },
+          "invited_entities_ids": {
+            "properties": {
+              "member_tags_ids": {
+                "items": {
+                  "type": "integer"
+                },
+                "type": "array"
+              },
+              "members_ids": {
+                "items": {
+                  "type": "integer"
+                },
+                "type": "array"
+              },
+              "space_groups_ids": {
+                "items": {
+                  "type": "integer"
+                },
+                "type": "array"
+              },
+              "spaces_ids": {
+                "items": {
+                  "type": "integer"
+                },
+                "type": "array"
+              }
+            },
+            "type": "object"
+          }
+        },
+        "type": "object"
+      },
+      "body": {
+        "type": "string"
+      },
+      "cover_image": {
+        "description": "signed_id of the cover image",
+        "type": "string"
+      },
+      "event_setting_attributes": {
+        "properties": {
+          "confirmation_message_button_link": {
+            "type": "string"
+          },
+          "confirmation_message_button_title": {
+            "type": "string"
+          },
+          "confirmation_message_description": {
+            "type": "string"
+          },
+          "confirmation_message_title": {
+            "type": "string"
+          },
+          "duration_in_seconds": {
+            "type": "integer"
+          },
+          "enable_custom_thank_you_message": {
+            "type": "boolean"
+          },
+          "hide_attendees": {
+            "type": "boolean"
+          },
+          "hide_location_from_non_attendees": {
+            "type": "boolean"
+          },
+          "host": {
+            "type": "string"
+          },
+          "in_person_location": {
+            "description": "A stringified Google Places API result. JSON-serialize the Places API response object before sending. Stored as-is in the database.",
+            "type": "string"
+          },
+          "live_stream_room_setting_attributes": {
+            "properties": {
+              "access_type": {
+                "description": "Access type for the live stream room. 'open' all community members will receive notifications to join, 'secret' invited members will receive notifications to join, 'public_stream' makes the event publicly accessible.",
+                "enum": [
+                  "open",
+                  "secret",
+                  "public_stream"
+                ],
+                "type": "string"
+              },
+              "auto_post_recording_enabled": {
+                "type": "boolean"
+              },
+              "hide_participants_list": {
+                "type": "boolean"
+              },
+              "limit_url_sharing": {
+                "type": "boolean"
+              },
+              "mute_on_join": {
+                "type": "boolean"
+              },
+              "recording_enabled": {
+                "type": "boolean"
+              },
+              "view_type": {
+                "description": "View type for the live stream room. 'speaker_view' shows the speaker view at the top, 'speaker_variant_view' shows the speaker view at the left side, 'grid_view' shows a grid of participants.",
+                "enum": [
+                  "speaker_view",
+                  "speaker_variant_view",
+                  "grid_view"
+                ],
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "location_type": {
+            "enum": [
+              "virtual",
+              "in_person",
+              "tbd",
+              "live_stream",
+              "live_room"
+            ],
+            "type": "string"
+          },
+          "rsvp_disabled": {
+            "type": "boolean"
+          },
+          "rsvp_limit": {
+            "type": "integer"
+          },
+          "rsvp_limit_enabled": {
+            "type": "boolean"
+          },
+          "send_email_confirmation": {
+            "type": "boolean"
+          },
+          "send_email_reminder": {
+            "type": "boolean"
+          },
+          "send_in_app_notification_confirmation": {
+            "type": "boolean"
+          },
+          "send_in_app_notification_reminder": {
+            "type": "boolean"
+          },
+          "send_publish_email": {
+            "type": "boolean"
+          },
+          "starts_at": {
+            "format": "date-time",
+            "type": "string"
+          },
+          "ticket_type": {
+            "enum": [
+              "paid",
+              "free"
+            ],
+            "type": "string"
+          },
+          "virtual_location_url": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "event_type": {
+        "enum": [
+          "single",
+          "recurring"
+        ],
+        "type": "string"
+      },
+      "hide_from_featured_areas": {
+        "type": "boolean"
+      },
+      "meta_tag_attributes": {
+        "properties": {
+          "meta_description": {
+            "type": "string"
+          },
+          "meta_title": {
+            "type": "string"
+          },
+          "opengraph_description": {
+            "type": "string"
+          },
+          "opengraph_image": {
+            "type": "string"
+          },
+          "opengraph_title": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "name": {
+        "type": "string"
+      },
+      "paywall_attributes": {
+        "properties": {
+          "currency_id": {
+            "type": "integer"
+          },
+          "description": {
+            "type": "string"
+          },
+          "price_amount": {
+            "type": "number"
+          }
+        },
+        "type": "object"
+      },
+      "recurring_setting_attributes": {
+        "properties": {
+          "edit_mode": {
+            "enum": [
+              "current",
+              "remaining",
+              "all"
+            ],
+            "type": "string"
+          },
+          "ends_at": {
+            "format": "date-time",
+            "type": "string"
+          },
+          "frequency": {
+            "enum": [
+              "daily",
+              "weekday",
+              "weekly",
+              "bi_weekly",
+              "monthly",
+              "monthly_weekday_based",
+              "annually",
+              "yearly"
+            ],
+            "type": "string"
+          },
+          "occurrences": {
+            "type": "integer"
+          }
+        },
+        "type": "object"
+      },
+      "slug": {
+        "type": "string"
+      },
+      "space_id": {
+        "type": "integer"
+      },
+      "status": {
+        "enum": [
+          "draft",
+          "published"
+        ],
+        "type": "string"
+      },
+      "thumbnail_image": {
+        "description": "signed_id of the thumbnail image",
+        "type": "string"
+      },
+      "topics": {
+        "items": {
+          "type": "integer"
+        },
+        "type": "array"
+      },
+      "user_id": {
+        "type": "integer"
+      }
+    },
+    "required": [
+      "name",
+      "space_id",
+      "status"
+    ],
+    "type": "object"
+  }
+}
    • changedInput schema / properties / confirm / description
      Previous value: -"Must be true for the specific user-requested write."New value: +"Set true only when the user asked for exactly this action."
    • addedInput schema / properties / event / $ref
      Added value: +"#/$defs/event"
    • removedInput schema / properties / event / properties
      Removed value: -{
-  "attendee_invite_attributes": {
-    "properties": {
-      "invited_cohost_ids": {
-        "items": {
-          "type": "integer"
-        },
-        "type": "array"
-      },
-      "invited_entities_ids": {
-        "properties": {
-          "member_tags_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "members_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "space_groups_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "spaces_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  "body": {
-    "type": "string"
-  },
-  "cover_image": {
-    "description": "signed_id of the cover image",
-    "type": "string"
-  },
-  "event_setting_attributes": {
-    "properties": {
-      "confirmation_message_button_link": {
-        "type": "string"
-      },
-      "confirmation_message_button_title": {
-        "type": "string"
-      },
-      "confirmation_message_description": {
-        "type": "string"
-      },
-      "confirmation_message_title": {
-        "type": "string"
-      },
-      "duration_in_seconds": {
-        "type": "integer"
-      },
-      "enable_custom_thank_you_message": {
-        "type": "boolean"
-      },
-      "hide_attendees": {
-        "type": "boolean"
-      },
-      "hide_location_from_non_attendees": {
-        "type": "boolean"
-      },
-      "host": {
-        "type": "string"
-      },
-      "in_person_location": {
-        "description": "A stringified Google Places API result. JSON-serialize the Places API response object before sending. Stored as-is in the database.",
-        "type": "string"
-      },
-      "live_stream_room_setting_attributes": {
-        "properties": {
-          "access_type": {
-            "description": "Access type for the live stream room. 'open' all community members will receive notifications to join, 'secret' invited members will receive notifications to join, 'public_stream' makes the event publicly accessible.",
-            "enum": [
-              "open",
-              "secret",
-              "public_stream"
-            ],
-            "type": "string"
-          },
-          "auto_post_recording_enabled": {
-            "type": "boolean"
-          },
-          "hide_participants_list": {
-            "type": "boolean"
-          },
-          "limit_url_sharing": {
-            "type": "boolean"
-          },
-          "mute_on_join": {
-            "type": "boolean"
-          },
-          "recording_enabled": {
-            "type": "boolean"
-          },
-          "view_type": {
-            "description": "View type for the live stream room. 'speaker_view' shows the speaker view at the top, 'speaker_variant_view' shows the speaker view at the left side, 'grid_view' shows a grid of participants.",
-            "enum": [
-              "speaker_view",
-              "speaker_variant_view",
-              "grid_view"
-            ],
-            "type": "string"
-          }
-        },
-        "type": "object"
-      },
-      "location_type": {
-        "enum": [
-          "virtual",
-          "in_person",
-          "tbd",
-          "live_stream",
-          "live_room"
-        ],
-        "type": "string"
-      },
-      "rsvp_disabled": {
-        "type": "boolean"
-      },
-      "rsvp_limit": {
-        "type": "integer"
-      },
-      "rsvp_limit_enabled": {
-        "type": "boolean"
-      },
-      "send_email_confirmation": {
-        "type": "boolean"
-      },
-      "send_email_reminder": {
-        "type": "boolean"
-      },
-      "send_in_app_notification_confirmation": {
-        "type": "boolean"
-      },
-      "send_in_app_notification_reminder": {
-        "type": "boolean"
-      },
-      "send_publish_email": {
-        "type": "boolean"
-      },
-      "starts_at": {
-        "format": "date-time",
-        "type": "string"
-      },
-      "ticket_type": {
-        "enum": [
-          "paid",
-          "free"
-        ],
-        "type": "string"
-      },
-      "virtual_location_url": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "event_type": {
-    "enum": [
-      "single",
-      "recurring"
-    ],
-    "type": "string"
-  },
-  "hide_from_featured_areas": {
-    "type": "boolean"
-  },
-  "meta_tag_attributes": {
-    "properties": {
-      "meta_description": {
-        "type": "string"
-      },
-      "meta_title": {
-        "type": "string"
-      },
-      "opengraph_description": {
-        "type": "string"
-      },
-      "opengraph_image": {
-        "type": "string"
-      },
-      "opengraph_title": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "name": {
-    "type": "string"
-  },
-  "paywall_attributes": {
-    "properties": {
-      "currency_id": {
-        "type": "integer"
-      },
-      "description": {
-        "type": "string"
-      },
-      "price_amount": {
-        "type": "number"
-      }
-    },
-    "type": "object"
-  },
-  "recurring_setting_attributes": {
-    "properties": {
-      "edit_mode": {
-        "enum": [
-          "current",
-          "remaining",
-          "all"
-        ],
-        "type": "string"
-      },
-      "ends_at": {
-        "format": "date-time",
-        "type": "string"
-      },
-      "frequency": {
-        "enum": [
-          "daily",
-          "weekday",
-          "weekly",
-          "bi_weekly",
-          "monthly",
-          "monthly_weekday_based",
-          "annually",
-          "yearly"
-        ],
-        "type": "string"
-      },
-      "occurrences": {
-        "type": "integer"
-      }
-    },
-    "type": "object"
-  },
-  "slug": {
-    "type": "string"
-  },
-  "space_id": {
-    "type": "integer"
-  },
-  "status": {
-    "enum": [
-      "draft",
-      "published"
-    ],
-    "type": "string"
-  },
-  "thumbnail_image": {
-    "description": "signed_id of the thumbnail image",
-    "type": "string"
-  },
-  "topics": {
-    "items": {
-      "type": "integer"
-    },
-    "type": "array"
-  },
-  "user_id": {
-    "type": "integer"
-  }
-}
    • removedInput schema / properties / event / required
      Removed value: -[
-  "name",
-  "space_id",
-  "status"
-]
    • removedInput schema / properties / event / type
      Removed value: -"object"
    • addedInput schema / properties / payload / properties / event / $ref
      Added value: +"#/$defs/event"
    • removedInput schema / properties / payload / properties / event / properties
      Removed value: -{
-  "attendee_invite_attributes": {
-    "properties": {
-      "invited_cohost_ids": {
-        "items": {
-          "type": "integer"
-        },
-        "type": "array"
-      },
-      "invited_entities_ids": {
-        "properties": {
-          "member_tags_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "members_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "space_groups_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          },
-          "spaces_ids": {
-            "items": {
-              "type": "integer"
-            },
-            "type": "array"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  "body": {
-    "type": "string"
-  },
-  "cover_image": {
-    "description": "signed_id of the cover image",
-    "type": "string"
-  },
-  "event_setting_attributes": {
-    "properties": {
-      "confirmation_message_button_link": {
-        "type": "string"
-      },
-      "confirmation_message_button_title": {
-        "type": "string"
-      },
-      "confirmation_message_description": {
-        "type": "string"
-      },
-      "confirmation_message_title": {
-        "type": "string"
-      },
-      "duration_in_seconds": {
-        "type": "integer"
-      },
-      "enable_custom_thank_you_message": {
-        "type": "boolean"
-      },
-      "hide_attendees": {
-        "type": "boolean"
-      },
-      "hide_location_from_non_attendees": {
-        "type": "boolean"
-      },
-      "host": {
-        "type": "string"
-      },
-      "in_person_location": {
-        "description": "A stringified Google Places API result. JSON-serialize the Places API response object before sending. Stored as-is in the database.",
-        "type": "string"
-      },
-      "live_stream_room_setting_attributes": {
-        "properties": {
-          "access_type": {
-            "description": "Access type for the live stream room. 'open' all community members will receive notifications to join, 'secret' invited members will receive notifications to join, 'public_stream' makes the event publicly accessible.",
-            "enum": [
-              "open",
-              "secret",
-              "public_stream"
-            ],
-            "type": "string"
-          },
-          "auto_post_recording_enabled": {
-            "type": "boolean"
-          },
-          "hide_participants_list": {
-            "type": "boolean"
-          },
-          "limit_url_sharing": {
-            "type": "boolean"
-          },
-          "mute_on_join": {
-            "type": "boolean"
-          },
-          "recording_enabled": {
-            "type": "boolean"
-          },
-          "view_type": {
-            "description": "View type for the live stream room. 'speaker_view' shows the speaker view at the top, 'speaker_variant_view' shows the speaker view at the left side, 'grid_view' shows a grid of participants.",
-            "enum": [
-              "speaker_view",
-              "speaker_variant_view",
-              "grid_view"
-            ],
-            "type": "string"
-          }
-        },
-        "type": "object"
-      },
-      "location_type": {
-        "enum": [
-          "virtual",
-          "in_person",
-          "tbd",
-          "live_stream",
-          "live_room"
-        ],
-        "type": "string"
-      },
-      "rsvp_disabled": {
-        "type": "boolean"
-      },
-      "rsvp_limit": {
-        "type": "integer"
-      },
-      "rsvp_limit_enabled": {
-        "type": "boolean"
-      },
-      "send_email_confirmation": {
-        "type": "boolean"
-      },
-      "send_email_reminder": {
-        "type": "boolean"
-      },
-      "send_in_app_notification_confirmation": {
-        "type": "boolean"
-      },
-      "send_in_app_notification_reminder": {
-        "type": "boolean"
-      },
-      "send_publish_email": {
-        "type": "boolean"
-      },
-      "starts_at": {
-        "format": "date-time",
-        "type": "string"
-      },
-      "ticket_type": {
-        "enum": [
-          "paid",
-          "free"
-        ],
-        "type": "string"
-      },
-      "virtual_location_url": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "event_type": {
-    "enum": [
-      "single",
-      "recurring"
-    ],
-    "type": "string"
-  },
-  "hide_from_featured_areas": {
-    "type": "boolean"
-  },
-  "meta_tag_attributes": {
-    "properties": {
-      "meta_description": {
-        "type": "string"
-      },
-      "meta_title": {
-        "type": "string"
-      },
-      "opengraph_description": {
-        "type": "string"
-      },
-      "opengraph_image": {
-        "type": "string"
-      },
-      "opengraph_title": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "name": {
-    "type": "string"
-  },
-  "paywall_attributes": {
-    "properties": {
-      "currency_id": {
-        "type": "integer"
-      },
-      "description": {
-        "type": "string"
-      },
-      "price_amount": {
-        "type": "number"
-      }
-    },
-    "type": "object"
-  },
-  "recurring_setting_attributes": {
-    "properties": {
-      "edit_mode": {
-        "enum": [
-          "current",
-          "remaining",
-          "all"
-        ],
-        "type": "string"
-      },
-      "ends_at": {
-        "format": "date-time",
-        "type": "string"
-      },
-      "frequency": {
-        "enum": [
-          "daily",
-          "weekday",
-          "weekly",
-          "bi_weekly",
-          "monthly",
-          "monthly_weekday_based",
-          "annually",
-          "yearly"
-        ],
-        "type": "string"
-      },
-      "occurrences": {
-        "type": "integer"
-      }
-    },
-    "type": "object"
-  },
-  "slug": {
-    "type": "string"
-  },
-  "space_id": {
-    "type": "integer"
-  },
-  "status": {
-    "enum": [
-      "draft",
-      "published"
-    ],
-    "type": "string"
-  },
-  "thumbnail_image": {
-    "description": "signed_id of the thumbnail image",
-    "type": "string"
-  },
-  "topics": {
-    "items": {
-      "type": "integer"
-    },
-    "type": "array"
-  },
-  "user_id": {
-    "type": "integer"
-  }
-}
    • removedInput schema / properties / payload / properties / event / required
      Removed value: -[
-  "name",
-  "space_id",
-  "status"
-]
    • removedInput schema / properties / payload / properties / event / type
      Removed value: -"object"
  2. First observedv2.0.0

TDQS

C2.6/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true, readOnlyHint=false, and openWorldHint=true, so the safety profile is covered. The description does add the valuable non-obvious constraint that confirm=true is required for the action, but it discloses nothing about what state changes, side effects, or notification emails the creation triggers for such a complex nested payload.

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

Conciseness4/5

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

Two short sentences with no filler, and the state-change/confirm warning is front-loaded. It is efficiently structured, though arguably terse given the tool's complexity rather than verbose.

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?

This is a highly complex write tool with six top-level parameters, deeply nested objects (event settings, live room, recurring settings), no output schema, and no required params. Such a sparse two-sentence description leaves an agent without enough context to invoke it correctly.

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 67%, above the 50% threshold, so the structured schema carries most parameter meaning. The description's only parameter-related content (confirm=true) duplicates the confirm field's own schema description, adding no new syntax or format detail for the many nested event attributes.

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

Purpose2/5

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

"Create Event" simply restates the tool name/title with no additional scope. It does not distinguish this tool from close siblings such as create_event_attendee, duplicate_event, or update_event, so an agent gains little beyond the name itself.

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 only guidance offered is "requires confirm=true for the user-requested action," which is a call precondition, not a when-to-use statement. There is no mention of when to pick create_event over duplicate_event or update_event.

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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