Notion MCP Server

Append Block Children

notion_append_block_children

Append new blocks as children to a Notion parent block, with optional positioning at start, end, or after another block.

Instructions

Append new children blocks to a specified parent block in Notion. Requires insert content capabilities. Use the optional 'position' object to insert at the start, end, or after a specific block.

Input Schema

TableJSON Schema

Name	Required	Description
`format`	No	Specify the response format. 'json' returns the original data structure, 'markdown' returns a more readable format. Use 'markdown' when the user only needs to read the page and isn't planning to write or modify it. Use 'json' when the user needs to read the page with the intention of writing to or modifying it.
`block_id`	Yes	The ID of the parent block. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).
`children`	Yes	Array of block objects to append. Each block must follow the Notion block schema.
`position`	No	Where to insert the children. Omit this to append at the end. Use { type: 'after_block', after_block: { id } } to replace the old Notion API 'after' parameter.

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv2.0.2Jun 25, 2026

addedInput schema / properties / children / items / properties / table

Added value: +{
+  "additionalProperties": {},
+  "description": "Table block object. Contains table_width columns and rows of cells. The table_width is immutable after creation.",
+  "properties": {
+    "children": {
+      "description": "Array of table_row block objects representing the rows of the table.",
+      "items": {
+        "additionalProperties": {},
+        "description": "A table_row block object.",
+        "properties": {
+          "table_row": {
+            "additionalProperties": {},
+            "description": "Table row content. Each cell is an array of rich text objects.",
+            "properties": {
+              "cells": {
+                "description": "Array of cells. Each cell is an array of rich text objects. The number of cells must match table_width.",
+                "items": {
+                  "description": "A single cell containing an array of rich text objects.",
+                  "items": {
+                    "additionalProperties": {},
+                    "description": "A rich text object.",
+                    "properties": {
+                      "annotations": {
+                        "additionalProperties": {},
+                        "description": "Styling information for the text. By default, give nothing for default text.",
+                        "properties": {
+                          "bold": {
+                            "type": "boolean"
+                          },
+                          "code": {
+                            "type": "boolean"
+                          },
+                          "color": {
+                            "description": "Color for the text.",
+                            "enum": [
+                              "default",
+                              "blue",
+                              "blue_background",
+                              "brown",
+                              "brown_background",
+                              "gray",
+                              "gray_background",
+                              "green",
+                              "green_background",
+                              "orange",
+                              "orange_background",
+                              "pink",
+                              "pink_background",
+                              "purple",
+                              "purple_background",
+                              "red",
+                              "red_background",
+                              "yellow",
+                              "yellow_background"
+                            ],
+                            "type": "string"
+                          },
+                          "italic": {
+                            "type": "boolean"
+                          },
+                          "strikethrough": {
+                            "type": "boolean"
+                          },
+                          "underline": {
+                            "type": "boolean"
+                          }
+                        },
+                        "type": "object"
+                      },
+                      "equation": {
+                        "additionalProperties": {},
+                        "description": "Equation object if type is 'equation'. Represents an inline LaTeX equation.",
+                        "properties": {
+                          "expression": {
+                            "description": "LaTeX string representing the inline equation.",
+                            "type": "string"
+                          }
+                        },
+                        "required": [
+                          "expression"
+                        ],
+                        "type": "object"
+                      },
+                      "href": {
+                        "description": "The URL of any link or mention in this text, if any. Do NOT provide a NULL value, just ignore this field if there is no link or mention.",
+                        "type": "string"
+                      },
+                      "mention": {
+                        "additionalProperties": {},
+                        "description": "Mention object if type is 'mention'. Represents an inline mention of a database, date, link preview, page, template mention, or user.",
+                        "properties": {
+                          "database": {
+                            "additionalProperties": {},
+                            "description": "Database mention object. Contains a database reference with an 'id' field.",
+                            "properties": {
+                              "id": {
+                                "description": "The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                                "type": "string"
+                              }
+                            },
+                            "required": [
+                              "id"
+                            ],
+                            "type": "object"
+                          },
+                          "date": {
+                            "additionalProperties": {},
+                            "description": "Date mention object, containing a date property value object.",
+                            "properties": {
+                              "end": {
+                                "description": "An ISO 8601 formatted end date or date-time, or null if not a range."
+                              },
+                              "start": {
+                                "description": "An ISO 8601 formatted start date or date-time.",
+                                "type": "string"
+                              },
+                              "time_zone": {
+                                "description": "Time zone information for start and end. If null, times are in UTC."
+                              }
+                            },
+                            "required": [
+                              "start"
+                            ],
+                            "type": "object"
+                          },
+                          "link_preview": {
+                            "additionalProperties": {},
+                            "description": "Link Preview mention object, containing a URL for the link preview.",
+                            "properties": {
+                              "url": {
+                                "description": "The URL for the link preview.",
+                                "type": "string"
+                              }
+                            },
+                            "required": [
+                              "url"
+                            ],
+                            "type": "object"
+                          },
+                          "page": {
+                            "additionalProperties": {},
+                            "description": "Page mention object, containing a page reference with an 'id' field.",
+                            "properties": {
+                              "id": {
+                                "description": "The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                                "type": "string"
+                              }
+                            },
+                            "required": [
+                              "id"
+                            ],
+                            "type": "object"
+                          },
+                          "template_mention": {
+                            "additionalProperties": {},
+                            "description": "Template mention object, can be a template_mention_date or template_mention_user.",
+                            "properties": {
+                              "template_mention_date": {
+                                "description": "For template_mention_date type, the date keyword.",
+                                "enum": [
+                                  "today",
+                                  "now"
+                                ],
+                                "type": "string"
+                              },
+                              "template_mention_user": {
+                                "description": "For template_mention_user type, the user keyword.",
+                                "enum": [
+                                  "me"
+                                ],
+                                "type": "string"
+                              },
+                              "type": {
+                                "description": "The template mention type.",
+                                "enum": [
+                                  "template_mention_date",
+                                  "template_mention_user"
+                                ],
+                                "type": "string"
+                              }
+                            },
+                            "type": "object"
+                          },
+                          "type": {
+                            "description": "The type of the mention.",
+                            "enum": [
+                              "database",
+                              "date",
+                              "link_preview",
+                              "page",
+                              "template_mention",
+                              "user"
+                            ],
+                            "type": "string"
+                          },
+                          "user": {
+                            "additionalProperties": {},
+                            "description": "User mention object, contains a user reference.",
+                            "properties": {
+                              "id": {
+                                "description": "The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                                "type": "string"
+                              },
+                              "object": {
+                                "description": "Should be 'user'.",
+                                "enum": [
+                                  "user"
+                                ],
+                                "type": "string"
+                              }
+                            },
+                            "required": [
+                              "object",
+                              "id"
+                            ],
+                            "type": "object"
+                          }
+                        },
+                        "required": [
+                          "type"
+                        ],
+                        "type": "object"
+                      },
+                      "plain_text": {
+                        "description": "The plain text without annotations.",
+                        "type": "string"
+                      },
+                      "text": {
+                        "additionalProperties": {},
+                        "description": "Object containing text content and optional link info. Required if type is 'text'.",
+                        "properties": {
+                          "content": {
+                            "description": "The actual text content.",
+                            "type": "string"
+                          },
+                          "link": {
+                            "additionalProperties": {},
+                            "description": "Optional link object with a 'url' field. Do NOT provide a NULL value, just ignore this field no link.",
+                            "properties": {
+                              "url": {
+                                "description": "The URL the text links to.",
+                                "type": "string"
+                              }
+                            },
+                            "type": "object"
+                          }
+                        },
+                        "type": "object"
+                      },
+                      "type": {
+                        "description": "The type of this rich text object. Possible values: text, mention, equation.",
+                        "enum": [
+                          "text",
+                          "mention",
+                          "equation"
+                        ],
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "type"
+                    ],
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "type": "array"
+              }
+            },
+            "required": [
+              "cells"
+            ],
+            "type": "object"
+          },
+          "type": {
+            "description": "Must be 'table_row'.",
+            "enum": [
+              "table_row"
+            ],
+            "type": "string"
+          }
+        },
+        "required": [
+          "type",
+          "table_row"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "has_column_header": {
+      "description": "Whether the table has a column header row. Default is false.",
+      "type": "boolean"
+    },
+    "has_row_header": {
+      "description": "Whether the table has a row header column. Default is false.",
+      "type": "boolean"
+    },
+    "table_width": {
+      "description": "Number of columns in the table. This value is immutable after creation.",
+      "type": "number"
+    }
+  },
+  "required": [
+    "table_width",
+    "children"
+  ],
+  "type": "object"
+}

addedInput schema / properties / children / items / properties / table_row

Added value: +{
+  "additionalProperties": {},
+  "description": "Table row block object. Each cell is an array of rich text objects.",
+  "properties": {
+    "cells": {
+      "description": "Array of cells. Each cell is an array of rich text objects.",
+      "items": {
+        "description": "A single cell containing an array of rich text objects.",
+        "items": {
+          "additionalProperties": {},
+          "description": "A rich text object.",
+          "properties": {
+            "annotations": {
+              "additionalProperties": {},
+              "description": "Styling information for the text. By default, give nothing for default text.",
+              "properties": {
+                "bold": {
+                  "type": "boolean"
+                },
+                "code": {
+                  "type": "boolean"
+                },
+                "color": {
+                  "description": "Color for the text.",
+                  "enum": [
+                    "default",
+                    "blue",
+                    "blue_background",
+                    "brown",
+                    "brown_background",
+                    "gray",
+                    "gray_background",
+                    "green",
+                    "green_background",
+                    "orange",
+                    "orange_background",
+                    "pink",
+                    "pink_background",
+                    "purple",
+                    "purple_background",
+                    "red",
+                    "red_background",
+                    "yellow",
+                    "yellow_background"
+                  ],
+                  "type": "string"
+                },
+                "italic": {
+                  "type": "boolean"
+                },
+                "strikethrough": {
+                  "type": "boolean"
+                },
+                "underline": {
+                  "type": "boolean"
+                }
+              },
+              "type": "object"
+            },
+            "equation": {
+              "additionalProperties": {},
+              "description": "Equation object if type is 'equation'. Represents an inline LaTeX equation.",
+              "properties": {
+                "expression": {
+                  "description": "LaTeX string representing the inline equation.",
+                  "type": "string"
+                }
+              },
+              "required": [
+                "expression"
+              ],
+              "type": "object"
+            },
+            "href": {
+              "description": "The URL of any link or mention in this text, if any. Do NOT provide a NULL value, just ignore this field if there is no link or mention.",
+              "type": "string"
+            },
+            "mention": {
+              "additionalProperties": {},
+              "description": "Mention object if type is 'mention'. Represents an inline mention of a database, date, link preview, page, template mention, or user.",
+              "properties": {
+                "database": {
+                  "additionalProperties": {},
+                  "description": "Database mention object. Contains a database reference with an 'id' field.",
+                  "properties": {
+                    "id": {
+                      "description": "The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "id"
+                  ],
+                  "type": "object"
+                },
+                "date": {
+                  "additionalProperties": {},
+                  "description": "Date mention object, containing a date property value object.",
+                  "properties": {
+                    "end": {
+                      "description": "An ISO 8601 formatted end date or date-time, or null if not a range."
+                    },
+                    "start": {
+                      "description": "An ISO 8601 formatted start date or date-time.",
+                      "type": "string"
+                    },
+                    "time_zone": {
+                      "description": "Time zone information for start and end. If null, times are in UTC."
+                    }
+                  },
+                  "required": [
+                    "start"
+                  ],
+                  "type": "object"
+                },
+                "link_preview": {
+                  "additionalProperties": {},
+                  "description": "Link Preview mention object, containing a URL for the link preview.",
+                  "properties": {
+                    "url": {
+                      "description": "The URL for the link preview.",
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "url"
+                  ],
+                  "type": "object"
+                },
+                "page": {
+                  "additionalProperties": {},
+                  "description": "Page mention object, containing a page reference with an 'id' field.",
+                  "properties": {
+                    "id": {
+                      "description": "The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "id"
+                  ],
+                  "type": "object"
+                },
+                "template_mention": {
+                  "additionalProperties": {},
+                  "description": "Template mention object, can be a template_mention_date or template_mention_user.",
+                  "properties": {
+                    "template_mention_date": {
+                      "description": "For template_mention_date type, the date keyword.",
+                      "enum": [
+                        "today",
+                        "now"
+                      ],
+                      "type": "string"
+                    },
+                    "template_mention_user": {
+                      "description": "For template_mention_user type, the user keyword.",
+                      "enum": [
+                        "me"
+                      ],
+                      "type": "string"
+                    },
+                    "type": {
+                      "description": "The template mention type.",
+                      "enum": [
+                        "template_mention_date",
+                        "template_mention_user"
+                      ],
+                      "type": "string"
+                    }
+                  },
+                  "type": "object"
+                },
+                "type": {
+                  "description": "The type of the mention.",
+                  "enum": [
+                    "database",
+                    "date",
+                    "link_preview",
+                    "page",
+                    "template_mention",
+                    "user"
+                  ],
+                  "type": "string"
+                },
+                "user": {
+                  "additionalProperties": {},
+                  "description": "User mention object, contains a user reference.",
+                  "properties": {
+                    "id": {
+                      "description": "The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+                      "type": "string"
+                    },
+                    "object": {
+                      "description": "Should be 'user'.",
+                      "enum": [
+                        "user"
+                      ],
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "object",
+                    "id"
+                  ],
+                  "type": "object"
+                }
+              },
+              "required": [
+                "type"
+              ],
+              "type": "object"
+            },
+            "plain_text": {
+              "description": "The plain text without annotations.",
+              "type": "string"
+            },
+            "text": {
+              "additionalProperties": {},
+              "description": "Object containing text content and optional link info. Required if type is 'text'.",
+              "properties": {
+                "content": {
+                  "description": "The actual text content.",
+                  "type": "string"
+                },
+                "link": {
+                  "additionalProperties": {},
+                  "description": "Optional link object with a 'url' field. Do NOT provide a NULL value, just ignore this field no link.",
+                  "properties": {
+                    "url": {
+                      "description": "The URL the text links to.",
+                      "type": "string"
+                    }
+                  },
+                  "type": "object"
+                }
+              },
+              "type": "object"
+            },
+            "type": {
+              "description": "The type of this rich text object. Possible values: text, mention, equation.",
+              "enum": [
+                "text",
+                "mention",
+                "equation"
+              ],
+              "type": "string"
+            }
+          },
+          "required": [
+            "type"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "cells"
+  ],
+  "type": "object"
+}

changedInput schema / properties / children / items / properties / type / description

Previous value: -"Type of the block. Possible values include 'paragraph', 'heading_1', 'heading_2', 'heading_3', 'bulleted_list_item', 'numbered_list_item', 'to_do', 'toggle', 'child_page', 'child_database', 'embed', 'callout', 'quote', 'equation', 'divider', 'table_of_contents', 'column', 'column_list', 'link_preview', 'synced_block', 'template', 'link_to_page', 'audio', 'bookmark', 'breadcrumb', 'code', 'file', 'image', 'pdf', 'video'. Not all types are supported for creation via API."New value: +"Type of the block. Possible values include 'paragraph', 'heading_1', 'heading_2', 'heading_3', 'bulleted_list_item', 'numbered_list_item', 'to_do', 'toggle', 'child_page', 'child_database', 'embed', 'callout', 'quote', 'equation', 'divider', 'table', 'table_row', 'table_of_contents', 'column', 'column_list', 'link_preview', 'synced_block', 'template', 'link_to_page', 'audio', 'bookmark', 'breadcrumb', 'code', 'file', 'image', 'pdf', 'video'. Not all types are supported for creation via API."

Changed149 schema fields changedv2.0.0May 18, 2026
- addedInput schema / $schema
```
Added value: +"http://json-schema.org/draft-07/schema#"
```
- addedInput schema / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / after
```
Removed value: -{
-  "description": "The ID of the existing block that the new block should be appended after.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
-  "type": "string"
-}
```
- changedInput schema / properties / block_id / description
```
Previous value: -"The ID of the parent block.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the parent block. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / children / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / children / items / properties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / bulleted_list_item / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / divider / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_1 / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_2 / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / heading_3 / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / children / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / children / items / properties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / numbered_list_item / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / children / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / children / items / properties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / paragraph / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / children / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / children / items / properties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / annotations / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / equation / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / oneOf
```
Removed value: -[
-  {
-    "required": [
-      "database"
-    ]
-  },
-  {
-    "required": [
-      "date"
-    ]
-  },
-  {
-    "required": [
-      "link_preview"
-    ]
-  },
-  {
-    "required": [
-      "page"
-    ]
-  },
-  {
-    "required": [
-      "template_mention"
-    ]
-  },
-  {
-    "required": [
-      "user"
-    ]
-  }
-]
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / database / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / database / properties / id / description
```
Previous value: -"The ID of the mentioned database.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned database. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / date / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / date / properties / end / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- removedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / date / properties / time_zone / type
```
Removed value: -[
-  "string",
-  "null"
-]
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / link_preview / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / page / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / page / properties / id / description
```
Previous value: -"The ID of the mentioned page.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the mentioned page. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / template_mention / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / user / additionalProperties
```
Added value: +{}
```
- changedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / mention / properties / user / properties / id / description
```
Previous value: -"The ID of the user.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."New value: +"The ID of the user. It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-)."
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / text / additionalProperties
```
Added value: +{}
```
- addedInput schema / properties / children / items / properties / toggle / properties / rich_text / items / properties / text / properties / link / additionalProperties
```
Added value: +{}
```
- removedInput schema / properties / format / default
```
Removed value: -"markdown"
```
- addedInput schema / properties / position
```
Added value: +{
+  "additionalProperties": {},
+  "description": "Where to insert the children. Omit this to append at the end. Use { type: 'after_block', after_block: { id } } to replace the old Notion API 'after' parameter.",
+  "properties": {
+    "after_block": {
+      "additionalProperties": {},
+      "properties": {
+        "id": {
+          "description": "The existing block ID to insert after.It should be a 32-character string (excluding hyphens) formatted as 8-4-4-4-12 with hyphens (-).",
+          "type": "string"
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    "type": {
+      "enum": [
+        "after_block",
+        "start",
+        "end"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "type"
+  ],
+  "type": "object"
+}
```
AddedSep 17, 2025

TDQS

A3.5/5.0

Behavior3/5

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

Annotations already indicate a write operation (readOnlyHint=false). The description adds that it requires insert content capabilities (permission hint) and mentions the position object for insertion control. No disclosure of rate limits, error behavior, or side effects beyond the schema. With limited annotation coverage, more behavioral context would be beneficial.

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?

Two sentences, front-loading the core action. Each sentence serves a purpose: defining the operation and noting the optional positioning. No unnecessary words. Ideal length for quick comprehension.

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

Completeness3/5

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

Given the complexity of the tool (nested objects, many block types) and no output schema, the description does not explain return values or how to construct the children array. The schema fills this gap, but the description could summarize the block structure or note common pitfalls. However, the schema is comprehensive and present, so the tool is still usable with effort.

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 already documents all parameters in detail. The description adds value specifically for the 'position' parameter by summarizing its usage (start, end, after a block). For other parameters (block_id, children), no additional meaning is provided. Overall, the description complements the schema but does not significantly enhance semantic 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?

Clearly states the action (append), resource (new children blocks to a parent block), and context (in Notion). The mention of 'insert content capabilities' adds a permission note. However, it does not differentiate from sibling tools like notion_append_content or notion_append_markdown, which serve similar purposes with different content formats.

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?

Provides a prerequisite ('Requires insert content capabilities') and hints at usage of the optional 'position' object. However, no explicit guidance on when to prefer this tool over alternatives (e.g., notion_append_content, notion_update_block). The agent would need to infer based on the schema of children blocks.

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

Append Block Children

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools