Circle MCP Server

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Create Message

send_message

Destructive

Create and deliver a Circle community message to chosen users or a chat room, with confirm=true required for user-requested actions.

Instructions

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

Input Schema

TableJSON Schema

Name	Required	Description
`account`	No	Named private Circle account; selects credentials, not a remote community ID.
`confirm`	No	Set true only when the user asked for exactly this action.
`payload`	No	Complete JSON request body instead of body flags. Supports nested Tiptap, maps and nullable values.
`user_email`	No
`user_emails`	No
`payload_file`	No	Regular local JSON body file, at most 5 MB. Cannot be mixed with body flags or payload.
`chat_room_uuid`	No
`rich_text_body`	No
`parent_message_id`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed8 schema fields changedv3.0.1Oct 7, 2026

addedInput schema / $defs

Added value: +{
+  "rich_text_body": {
+    "properties": {
+      "attachments": {
+        "items": {},
+        "type": "array"
+      },
+      "body": {
+        "properties": {
+          "content": {
+            "items": {
+              "properties": {
+                "content": {
+                  "items": {
+                    "properties": {
+                      "attrs": {
+                        "properties": {
+                          "href": {
+                            "type": [
+                              "string",
+                              "null"
+                            ]
+                          },
+                          "sgid": {
+                            "type": "string"
+                          },
+                          "target": {
+                            "type": [
+                              "string",
+                              "null"
+                            ]
+                          }
+                        },
+                        "required": [
+                          "sgid"
+                        ],
+                        "type": "object"
+                      },
+                      "circle_ios_fallback_text": {
+                        "type": [
+                          "string",
+                          "null"
+                        ]
+                      },
+                      "marks": {
+                        "items": {
+                          "properties": {
+                            "attrs": {
+                              "properties": {
+                                "href": {
+                                  "type": "string"
+                                },
+                                "target": {
+                                  "type": "string"
+                                }
+                              },
+                              "type": "object"
+                            },
+                            "type": {
+                              "type": "string"
+                            }
+                          },
+                          "type": "object"
+                        },
+                        "type": [
+                          "array",
+                          "null"
+                        ]
+                      },
+                      "text": {
+                        "type": [
+                          "string",
+                          "null"
+                        ]
+                      },
+                      "type": {
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "type"
+                    ],
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "type": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "type",
+                "content"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "type": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "circle_ios_fallback_text": {
+        "type": "string"
+      },
+      "community_members": {
+        "items": {},
+        "type": "array"
+      },
+      "entities": {
+        "items": {},
+        "type": "array"
+      },
+      "format": {
+        "type": "string"
+      },
+      "group_mentions": {
+        "items": {},
+        "type": "array"
+      },
+      "inline_attachments": {
+        "items": {},
+        "type": "array"
+      },
+      "polls": {
+        "items": {},
+        "type": "array"
+      },
+      "sgids_to_object_map": {
+        "type": "object"
+      }
+    },
+    "type": [
+      "object",
+      "null"
+    ]
+  }
+}

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 / payload / properties / rich_text_body / $ref
```
Added value: +"#/$defs/rich_text_body"
```

removedInput schema / properties / payload / properties / rich_text_body / properties

Removed value: -{
-  "attachments": {
-    "items": {},
-    "type": "array"
-  },
-  "body": {
-    "properties": {
-      "content": {
-        "items": {
-          "properties": {
-            "content": {
-              "items": {
-                "properties": {
-                  "attrs": {
-                    "properties": {
-                      "href": {
-                        "type": [
-                          "string",
-                          "null"
-                        ]
-                      },
-                      "sgid": {
-                        "type": "string"
-                      },
-                      "target": {
-                        "type": [
-                          "string",
-                          "null"
-                        ]
-                      }
-                    },
-                    "required": [
-                      "sgid"
-                    ],
-                    "type": "object"
-                  },
-                  "circle_ios_fallback_text": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "marks": {
-                    "items": {
-                      "properties": {
-                        "attrs": {
-                          "properties": {
-                            "href": {
-                              "type": "string"
-                            },
-                            "target": {
-                              "type": "string"
-                            }
-                          },
-                          "type": "object"
-                        },
-                        "type": {
-                          "type": "string"
-                        }
-                      },
-                      "type": "object"
-                    },
-                    "type": [
-                      "array",
-                      "null"
-                    ]
-                  },
-                  "text": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": {
-                    "type": "string"
-                  }
-                },
-                "required": [
-                  "type"
-                ],
-                "type": "object"
-              },
-              "type": "array"
-            },
-            "type": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "type",
-            "content"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "type": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "circle_ios_fallback_text": {
-    "type": "string"
-  },
-  "community_members": {
-    "items": {},
-    "type": "array"
-  },
-  "entities": {
-    "items": {},
-    "type": "array"
-  },
-  "format": {
-    "type": "string"
-  },
-  "group_mentions": {
-    "items": {},
-    "type": "array"
-  },
-  "inline_attachments": {
-    "items": {},
-    "type": "array"
-  },
-  "polls": {
-    "items": {},
-    "type": "array"
-  },
-  "sgids_to_object_map": {
-    "type": "object"
-  }
-}

removedInput schema / properties / payload / properties / rich_text_body / type
```
Removed value: -[
-  "object",
-  "null"
-]
```
addedInput schema / properties / rich_text_body / $ref
```
Added value: +"#/$defs/rich_text_body"
```

removedInput schema / properties / rich_text_body / properties

Removed value: -{
-  "attachments": {
-    "items": {},
-    "type": "array"
-  },
-  "body": {
-    "properties": {
-      "content": {
-        "items": {
-          "properties": {
-            "content": {
-              "items": {
-                "properties": {
-                  "attrs": {
-                    "properties": {
-                      "href": {
-                        "type": [
-                          "string",
-                          "null"
-                        ]
-                      },
-                      "sgid": {
-                        "type": "string"
-                      },
-                      "target": {
-                        "type": [
-                          "string",
-                          "null"
-                        ]
-                      }
-                    },
-                    "required": [
-                      "sgid"
-                    ],
-                    "type": "object"
-                  },
-                  "circle_ios_fallback_text": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "marks": {
-                    "items": {
-                      "properties": {
-                        "attrs": {
-                          "properties": {
-                            "href": {
-                              "type": "string"
-                            },
-                            "target": {
-                              "type": "string"
-                            }
-                          },
-                          "type": "object"
-                        },
-                        "type": {
-                          "type": "string"
-                        }
-                      },
-                      "type": "object"
-                    },
-                    "type": [
-                      "array",
-                      "null"
-                    ]
-                  },
-                  "text": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": {
-                    "type": "string"
-                  }
-                },
-                "required": [
-                  "type"
-                ],
-                "type": "object"
-              },
-              "type": "array"
-            },
-            "type": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "type",
-            "content"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "type": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  "circle_ios_fallback_text": {
-    "type": "string"
-  },
-  "community_members": {
-    "items": {},
-    "type": "array"
-  },
-  "entities": {
-    "items": {},
-    "type": "array"
-  },
-  "format": {
-    "type": "string"
-  },
-  "group_mentions": {
-    "items": {},
-    "type": "array"
-  },
-  "inline_attachments": {
-    "items": {},
-    "type": "array"
-  },
-  "polls": {
-    "items": {},
-    "type": "array"
-  },
-  "sgids_to_object_map": {
-    "type": "object"
-  }
-}

removedInput schema / properties / rich_text_body / type
```
Removed value: -[
-  "object",
-  "null"
-]
```

First observedv2.0.0Oct 2, 2026

TDQS

C2.3/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=false, destructiveHint=true, openWorldHint=true, and idempotentHint=false, so the safety profile is covered. The description adds one genuinely useful disclosure beyond them: the mandatory confirm=true gate and that the operation 'changes community state.' It still omits what gets mutated, delivery semantics, or any rate-limit context.

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

Conciseness3/5

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

The description is short and front-loaded, but the first sentence is pure filler that duplicates the title, and the second sentence crams a state-change claim and a confirmation rule into one clause. It is efficient in length but low in information density.

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 9-parameter mutation tool with nested rich-text objects, zero required fields, no output schema, and an openWorld hint, the description is far too thin. An agent cannot tell from it how to target a recipient, what rich_text_body should contain, or what the confirmation actually authorizes.

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

Parameters2/5

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

Schema description coverage is only 44% across 9 parameters, and the description explains none of them. Key selectors such as user_email, user_emails, chat_room_uuid, rich_text_body, and parent_message_id are undocumented in both the schema and the prose, so the description fails to compensate for the coverage gap.

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?

The body is essentially the title restated: 'Create Message.' It names no target (DM vs. chat room), no scope, and does nothing to distinguish it from close siblings like create_comment, create_post, or import_chat_room_message. This is tautological rather than a specific verb+resource with sibling differentiation.

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?

There is no when-to-use guidance and no named alternative. The only actionable hint is the bare mention that confirm=true is required 'for the user-requested action,' which is a gating note rather than usage context, and it doesn't say when NOT to use the tool or which sibling to prefer.

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

Deploy Server

Create Message

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools