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Microsoft 365 MCP Server

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TypeScript
Hybrid

update-mail-rule

update-mail-rule
Destructive

Modify an existing Microsoft 365 inbox message rule by sending only the properties to change, such as disabling it with isEnabled: false or updating conditions, exceptions, and actions.

Instructions

Change writable properties on a messageRule object and save the changes.

šŸ’” TIP: Updates an existing message rule. Use the Inbox folder ID (get it from list-mail-folders) for inbox rules. Send only the properties to change. Common use: { isEnabled: false } to disable a rule, or update conditions/actions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bodyYes
confirmNoFor destructive operations when the confirm gate is enabled (MS365_MCP_REQUIRE_CONFIRM=true; off by default). Set to true only after the user has explicitly approved this action. When the gate is on, calls without confirm: true return { error: "confirmation_required" } without touching user data.
mailFolderIdYesValue for the 'mailFolderId' path segment. Pass it under the name 'mailFolderId', not as 'id'. Use the 'id' field of the mail folder object as returned by Microsoft Graph.
messageRuleIdYesValue for the 'messageRuleId' path segment. Pass it under the name 'messageRuleId', not as 'id'. Use the 'id' field of the message rule object as returned by Microsoft Graph.
includeHeadersNoInclude response headers (including ETag) in the response metadata
excludeResponseNoExclude the full response body and only return success or failure indication

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed180 schema fields changedv0.145.2
    • removedInput schema / $defs
      Removed value: -{
-  "def0": {
-    "additionalProperties": true,
-    "properties": {
-      "emailAddress": {
-        "additionalProperties": true,
-        "properties": {
-          "address": {
-            "description": "The email address of the person or entity.",
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "name": {
-            "description": "The display name of the person or entity.",
-            "type": [
-              "string",
-              "null"
-            ]
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  "def1": {
-    "enum": [
-      "low",
-      "normal",
-      "high"
-    ],
-    "type": "string"
-  },
-  "def10": {
-    "description": "Indicates whether an incoming message must be automatically forwarded in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def11": {
-    "description": "Indicates whether an incoming message must be an auto reply in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def12": {
-    "description": "Indicates whether an incoming message must be encrypted in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def13": {
-    "description": "Indicates whether an incoming message must be a meeting request in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def14": {
-    "description": "Indicates whether an incoming message must be a meeting response in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def15": {
-    "description": "Indicates whether an incoming message must be a non-delivery report in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def16": {
-    "description": "Indicates whether an incoming message must be permission controlled (RMS-protected) in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def17": {
-    "description": "Indicates whether an incoming message must be a read receipt in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def18": {
-    "description": "Indicates whether an incoming message must be S/MIME-signed in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def19": {
-    "description": "Indicates whether an incoming message must be a voice mail in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def2": {
-    "description": "Represents the strings that should appear in the body of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def20": {
-    "enum": [
-      "any",
-      "call",
-      "doNotForward",
-      "followUp",
-      "fyi",
-      "forward",
-      "noResponseNecessary",
-      "read",
-      "reply",
-      "replyToAll",
-      "review"
-    ],
-    "type": "string"
-  },
-  "def21": {
-    "description": "Indicates whether the owner of the mailbox must not be a recipient of an incoming message in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def22": {
-    "description": "Represents the strings that appear in either the toRecipients or ccRecipients properties of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def23": {
-    "description": "Represents the strings that appear in the from property of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def24": {
-    "enum": [
-      "normal",
-      "personal",
-      "private",
-      "confidential"
-    ],
-    "type": "string"
-  },
-  "def25": {
-    "description": "Indicates whether the owner of the mailbox must be in the ccRecipients property of an incoming message in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def26": {
-    "description": "Indicates whether the owner of the mailbox must be the only recipient in an incoming message in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def3": {
-    "description": "Represents the strings that should appear in the body or subject of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def4": {
-    "description": "Represents the categories that an incoming message should be labeled with in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def5": {
-    "description": "Represents the specific sender email addresses of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "$ref": "#/$defs/def0"
-    },
-    "type": "array"
-  },
-  "def6": {
-    "description": "Indicates whether an incoming message must have attachments in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  },
-  "def7": {
-    "description": "Represents the strings that appear in the headers of an incoming message in order for the condition or exception to apply.",
-    "items": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "type": "array"
-  },
-  "def8": {
-    "$ref": "#/$defs/def1"
-  },
-  "def9": {
-    "description": "Indicates whether an incoming message must be an approval request in order for the condition or exception to apply.",
-    "type": [
-      "boolean",
-      "null"
-    ]
-  }
-}
    • removedInput schema / properties / body / properties / actions / properties / forwardAsAttachmentTo / items / $ref
      Removed value: -"#/$defs/def0"
    • addedInput schema / properties / body / properties / actions / properties / forwardAsAttachmentTo / items / additionalProperties
      Added value: +true
    • addedInput schema / properties / body / properties / actions / properties / forwardAsAttachmentTo / items / properties
      Added value: +{
+  "emailAddress": {
+    "additionalProperties": true,
+    "properties": {
+      "address": {
+        "description": "The email address of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "name": {
+        "description": "The display name of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  }
+}
    • addedInput schema / properties / body / properties / actions / properties / forwardAsAttachmentTo / items / type
      Added value: +"object"
    • removedInput schema / properties / body / properties / actions / properties / forwardTo / items / $ref
      Removed value: -"#/$defs/def0"
    • addedInput schema / properties / body / properties / actions / properties / forwardTo / items / additionalProperties
      Added value: +true
    • addedInput schema / properties / body / properties / actions / properties / forwardTo / items / properties
      Added value: +{
+  "emailAddress": {
+    "additionalProperties": true,
+    "properties": {
+      "address": {
+        "description": "The email address of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "name": {
+        "description": "The display name of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  }
+}
    • addedInput schema / properties / body / properties / actions / properties / forwardTo / items / type
      Added value: +"object"
    • removedInput schema / properties / body / properties / actions / properties / markImportance / $ref
      Removed value: -"#/$defs/def1"
    • addedInput schema / properties / body / properties / actions / properties / markImportance / enum
      Added value: +[
+  "low",
+  "normal",
+  "high"
+]
    • addedInput schema / properties / body / properties / actions / properties / markImportance / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / actions / properties / redirectTo / items / $ref
      Removed value: -"#/$defs/def0"
    • addedInput schema / properties / body / properties / actions / properties / redirectTo / items / additionalProperties
      Added value: +true
    • addedInput schema / properties / body / properties / actions / properties / redirectTo / items / properties
      Added value: +{
+  "emailAddress": {
+    "additionalProperties": true,
+    "properties": {
+      "address": {
+        "description": "The email address of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "name": {
+        "description": "The display name of the person or entity.",
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  }
+}
    • addedInput schema / properties / body / properties / actions / properties / redirectTo / items / type
      Added value: +"object"
    • removedInput schema / properties / body / properties / conditions / properties / bodyContains / $ref
      Removed value: -"#/$defs/def2"
    • addedInput schema / properties / body / properties / conditions / properties / bodyContains / description
      Added value: +"Represents the strings that should appear in the body of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / bodyContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / bodyContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / bodyOrSubjectContains / $ref
      Removed value: -"#/$defs/def3"
    • addedInput schema / properties / body / properties / conditions / properties / bodyOrSubjectContains / description
      Added value: +"Represents the strings that should appear in the body or subject of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / bodyOrSubjectContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / bodyOrSubjectContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / categories / $ref
      Removed value: -"#/$defs/def4"
    • addedInput schema / properties / body / properties / conditions / properties / categories / description
      Added value: +"Represents the categories that an incoming message should be labeled with in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / categories / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / categories / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / fromAddresses / $ref
      Removed value: -"#/$defs/def5"
    • addedInput schema / properties / body / properties / conditions / properties / fromAddresses / description
      Added value: +"Represents the specific sender email addresses of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / fromAddresses / items
      Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "emailAddress": {
+      "additionalProperties": true,
+      "properties": {
+        "address": {
+          "description": "The email address of the person or entity.",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "name": {
+          "description": "The display name of the person or entity.",
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}
    • addedInput schema / properties / body / properties / conditions / properties / fromAddresses / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / hasAttachments / $ref
      Removed value: -"#/$defs/def6"
    • addedInput schema / properties / body / properties / conditions / properties / hasAttachments / description
      Added value: +"Indicates whether an incoming message must have attachments in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / hasAttachments / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / headerContains / $ref
      Removed value: -"#/$defs/def7"
    • addedInput schema / properties / body / properties / conditions / properties / headerContains / description
      Added value: +"Represents the strings that appear in the headers of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / headerContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / headerContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / importance / $ref
      Removed value: -"#/$defs/def8"
    • addedInput schema / properties / body / properties / conditions / properties / importance / enum
      Added value: +[
+  "low",
+  "normal",
+  "high"
+]
    • addedInput schema / properties / body / properties / conditions / properties / importance / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / conditions / properties / isApprovalRequest / $ref
      Removed value: -"#/$defs/def9"
    • addedInput schema / properties / body / properties / conditions / properties / isApprovalRequest / description
      Added value: +"Indicates whether an incoming message must be an approval request in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isApprovalRequest / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isAutomaticForward / $ref
      Removed value: -"#/$defs/def10"
    • addedInput schema / properties / body / properties / conditions / properties / isAutomaticForward / description
      Added value: +"Indicates whether an incoming message must be automatically forwarded in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isAutomaticForward / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isAutomaticReply / $ref
      Removed value: -"#/$defs/def11"
    • addedInput schema / properties / body / properties / conditions / properties / isAutomaticReply / description
      Added value: +"Indicates whether an incoming message must be an auto reply in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isAutomaticReply / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isEncrypted / $ref
      Removed value: -"#/$defs/def12"
    • addedInput schema / properties / body / properties / conditions / properties / isEncrypted / description
      Added value: +"Indicates whether an incoming message must be encrypted in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isEncrypted / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isMeetingRequest / $ref
      Removed value: -"#/$defs/def13"
    • addedInput schema / properties / body / properties / conditions / properties / isMeetingRequest / description
      Added value: +"Indicates whether an incoming message must be a meeting request in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isMeetingRequest / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isMeetingResponse / $ref
      Removed value: -"#/$defs/def14"
    • addedInput schema / properties / body / properties / conditions / properties / isMeetingResponse / description
      Added value: +"Indicates whether an incoming message must be a meeting response in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isMeetingResponse / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isNonDeliveryReport / $ref
      Removed value: -"#/$defs/def15"
    • addedInput schema / properties / body / properties / conditions / properties / isNonDeliveryReport / description
      Added value: +"Indicates whether an incoming message must be a non-delivery report in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isNonDeliveryReport / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isPermissionControlled / $ref
      Removed value: -"#/$defs/def16"
    • addedInput schema / properties / body / properties / conditions / properties / isPermissionControlled / description
      Added value: +"Indicates whether an incoming message must be permission controlled (RMS-protected) in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isPermissionControlled / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isReadReceipt / $ref
      Removed value: -"#/$defs/def17"
    • addedInput schema / properties / body / properties / conditions / properties / isReadReceipt / description
      Added value: +"Indicates whether an incoming message must be a read receipt in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isReadReceipt / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isSigned / $ref
      Removed value: -"#/$defs/def18"
    • addedInput schema / properties / body / properties / conditions / properties / isSigned / description
      Added value: +"Indicates whether an incoming message must be S/MIME-signed in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isSigned / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / isVoicemail / $ref
      Removed value: -"#/$defs/def19"
    • addedInput schema / properties / body / properties / conditions / properties / isVoicemail / description
      Added value: +"Indicates whether an incoming message must be a voice mail in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / isVoicemail / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / messageActionFlag / $ref
      Removed value: -"#/$defs/def20"
    • addedInput schema / properties / body / properties / conditions / properties / messageActionFlag / enum
      Added value: +[
+  "any",
+  "call",
+  "doNotForward",
+  "followUp",
+  "fyi",
+  "forward",
+  "noResponseNecessary",
+  "read",
+  "reply",
+  "replyToAll",
+  "review"
+]
    • addedInput schema / properties / body / properties / conditions / properties / messageActionFlag / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / conditions / properties / notSentToMe / $ref
      Removed value: -"#/$defs/def21"
    • addedInput schema / properties / body / properties / conditions / properties / notSentToMe / description
      Added value: +"Indicates whether the owner of the mailbox must not be a recipient of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / notSentToMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / recipientContains / $ref
      Removed value: -"#/$defs/def22"
    • addedInput schema / properties / body / properties / conditions / properties / recipientContains / description
      Added value: +"Represents the strings that appear in either the toRecipients or ccRecipients properties of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / recipientContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / recipientContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / senderContains / $ref
      Removed value: -"#/$defs/def23"
    • addedInput schema / properties / body / properties / conditions / properties / senderContains / description
      Added value: +"Represents the strings that appear in the from property of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / senderContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / conditions / properties / senderContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / conditions / properties / sensitivity / $ref
      Removed value: -"#/$defs/def24"
    • addedInput schema / properties / body / properties / conditions / properties / sensitivity / enum
      Added value: +[
+  "normal",
+  "personal",
+  "private",
+  "confidential"
+]
    • addedInput schema / properties / body / properties / conditions / properties / sensitivity / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / conditions / properties / sentCcMe / $ref
      Removed value: -"#/$defs/def25"
    • addedInput schema / properties / body / properties / conditions / properties / sentCcMe / description
      Added value: +"Indicates whether the owner of the mailbox must be in the ccRecipients property of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / sentCcMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / conditions / properties / sentOnlyToMe / $ref
      Removed value: -"#/$defs/def26"
    • addedInput schema / properties / body / properties / conditions / properties / sentOnlyToMe / description
      Added value: +"Indicates whether the owner of the mailbox must be the only recipient in an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / conditions / properties / sentOnlyToMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / bodyContains / $ref
      Removed value: -"#/$defs/def2"
    • addedInput schema / properties / body / properties / exceptions / properties / bodyContains / description
      Added value: +"Represents the strings that should appear in the body of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / bodyContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / bodyContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / bodyOrSubjectContains / $ref
      Removed value: -"#/$defs/def3"
    • addedInput schema / properties / body / properties / exceptions / properties / bodyOrSubjectContains / description
      Added value: +"Represents the strings that should appear in the body or subject of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / bodyOrSubjectContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / bodyOrSubjectContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / categories / $ref
      Removed value: -"#/$defs/def4"
    • addedInput schema / properties / body / properties / exceptions / properties / categories / description
      Added value: +"Represents the categories that an incoming message should be labeled with in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / categories / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / categories / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / fromAddresses / $ref
      Removed value: -"#/$defs/def5"
    • addedInput schema / properties / body / properties / exceptions / properties / fromAddresses / description
      Added value: +"Represents the specific sender email addresses of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / fromAddresses / items
      Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "emailAddress": {
+      "additionalProperties": true,
+      "properties": {
+        "address": {
+          "description": "The email address of the person or entity.",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "name": {
+          "description": "The display name of the person or entity.",
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}
    • addedInput schema / properties / body / properties / exceptions / properties / fromAddresses / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / hasAttachments / $ref
      Removed value: -"#/$defs/def6"
    • addedInput schema / properties / body / properties / exceptions / properties / hasAttachments / description
      Added value: +"Indicates whether an incoming message must have attachments in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / hasAttachments / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / headerContains / $ref
      Removed value: -"#/$defs/def7"
    • addedInput schema / properties / body / properties / exceptions / properties / headerContains / description
      Added value: +"Represents the strings that appear in the headers of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / headerContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / headerContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / importance / $ref
      Removed value: -"#/$defs/def8"
    • addedInput schema / properties / body / properties / exceptions / properties / importance / enum
      Added value: +[
+  "low",
+  "normal",
+  "high"
+]
    • addedInput schema / properties / body / properties / exceptions / properties / importance / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / exceptions / properties / isApprovalRequest / $ref
      Removed value: -"#/$defs/def9"
    • addedInput schema / properties / body / properties / exceptions / properties / isApprovalRequest / description
      Added value: +"Indicates whether an incoming message must be an approval request in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isApprovalRequest / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isAutomaticForward / $ref
      Removed value: -"#/$defs/def10"
    • addedInput schema / properties / body / properties / exceptions / properties / isAutomaticForward / description
      Added value: +"Indicates whether an incoming message must be automatically forwarded in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isAutomaticForward / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isAutomaticReply / $ref
      Removed value: -"#/$defs/def11"
    • addedInput schema / properties / body / properties / exceptions / properties / isAutomaticReply / description
      Added value: +"Indicates whether an incoming message must be an auto reply in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isAutomaticReply / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isEncrypted / $ref
      Removed value: -"#/$defs/def12"
    • addedInput schema / properties / body / properties / exceptions / properties / isEncrypted / description
      Added value: +"Indicates whether an incoming message must be encrypted in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isEncrypted / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isMeetingRequest / $ref
      Removed value: -"#/$defs/def13"
    • addedInput schema / properties / body / properties / exceptions / properties / isMeetingRequest / description
      Added value: +"Indicates whether an incoming message must be a meeting request in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isMeetingRequest / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isMeetingResponse / $ref
      Removed value: -"#/$defs/def14"
    • addedInput schema / properties / body / properties / exceptions / properties / isMeetingResponse / description
      Added value: +"Indicates whether an incoming message must be a meeting response in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isMeetingResponse / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isNonDeliveryReport / $ref
      Removed value: -"#/$defs/def15"
    • addedInput schema / properties / body / properties / exceptions / properties / isNonDeliveryReport / description
      Added value: +"Indicates whether an incoming message must be a non-delivery report in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isNonDeliveryReport / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isPermissionControlled / $ref
      Removed value: -"#/$defs/def16"
    • addedInput schema / properties / body / properties / exceptions / properties / isPermissionControlled / description
      Added value: +"Indicates whether an incoming message must be permission controlled (RMS-protected) in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isPermissionControlled / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isReadReceipt / $ref
      Removed value: -"#/$defs/def17"
    • addedInput schema / properties / body / properties / exceptions / properties / isReadReceipt / description
      Added value: +"Indicates whether an incoming message must be a read receipt in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isReadReceipt / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isSigned / $ref
      Removed value: -"#/$defs/def18"
    • addedInput schema / properties / body / properties / exceptions / properties / isSigned / description
      Added value: +"Indicates whether an incoming message must be S/MIME-signed in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isSigned / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / isVoicemail / $ref
      Removed value: -"#/$defs/def19"
    • addedInput schema / properties / body / properties / exceptions / properties / isVoicemail / description
      Added value: +"Indicates whether an incoming message must be a voice mail in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / isVoicemail / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / messageActionFlag / $ref
      Removed value: -"#/$defs/def20"
    • addedInput schema / properties / body / properties / exceptions / properties / messageActionFlag / enum
      Added value: +[
+  "any",
+  "call",
+  "doNotForward",
+  "followUp",
+  "fyi",
+  "forward",
+  "noResponseNecessary",
+  "read",
+  "reply",
+  "replyToAll",
+  "review"
+]
    • addedInput schema / properties / body / properties / exceptions / properties / messageActionFlag / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / exceptions / properties / notSentToMe / $ref
      Removed value: -"#/$defs/def21"
    • addedInput schema / properties / body / properties / exceptions / properties / notSentToMe / description
      Added value: +"Indicates whether the owner of the mailbox must not be a recipient of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / notSentToMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / recipientContains / $ref
      Removed value: -"#/$defs/def22"
    • addedInput schema / properties / body / properties / exceptions / properties / recipientContains / description
      Added value: +"Represents the strings that appear in either the toRecipients or ccRecipients properties of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / recipientContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / recipientContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / senderContains / $ref
      Removed value: -"#/$defs/def23"
    • addedInput schema / properties / body / properties / exceptions / properties / senderContains / description
      Added value: +"Represents the strings that appear in the from property of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / senderContains / items
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedInput schema / properties / body / properties / exceptions / properties / senderContains / type
      Added value: +"array"
    • removedInput schema / properties / body / properties / exceptions / properties / sensitivity / $ref
      Removed value: -"#/$defs/def24"
    • addedInput schema / properties / body / properties / exceptions / properties / sensitivity / enum
      Added value: +[
+  "normal",
+  "personal",
+  "private",
+  "confidential"
+]
    • addedInput schema / properties / body / properties / exceptions / properties / sensitivity / type
      Added value: +"string"
    • removedInput schema / properties / body / properties / exceptions / properties / sentCcMe / $ref
      Removed value: -"#/$defs/def25"
    • addedInput schema / properties / body / properties / exceptions / properties / sentCcMe / description
      Added value: +"Indicates whether the owner of the mailbox must be in the ccRecipients property of an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / sentCcMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
    • removedInput schema / properties / body / properties / exceptions / properties / sentOnlyToMe / $ref
      Removed value: -"#/$defs/def26"
    • addedInput schema / properties / body / properties / exceptions / properties / sentOnlyToMe / description
      Added value: +"Indicates whether the owner of the mailbox must be the only recipient in an incoming message in order for the condition or exception to apply."
    • addedInput schema / properties / body / properties / exceptions / properties / sentOnlyToMe / type
      Added value: +[
+  "boolean",
+  "null"
+]
  2. Addedv0.134.4
  3. Removedv0.131.2
  4. Changed1 schema field changedv0.131.1
    • addedInput schema / properties / confirm
      Added value: +{
+  "description": "For destructive operations when the confirm gate is enabled (MS365_MCP_REQUIRE_CONFIRM=true; off by default). Set to true only after the user has explicitly approved this action. When the gate is on, calls without confirm: true return { error: \"confirmation_required\" } without touching user data.",
+  "type": "boolean"
+}
  5. Addedv0.114.0
  6. Removedv0.112.2
  7. Addedv0.110.0
  8. Removedv0.108.0
  9. Addedv0.96.0

TDQS

A4.3/5.0
Behavior4/5

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

Annotations mark destructiveHint: true and readOnlyHint: false, which the description aligns with ('change', 'save'). The description adds meaningful behavior beyond annotations: it clarifies PATCH semantics ('send only the properties to change'), and notes that only writable properties are affected. No contradiction. The confirm-gate behavior is documented in the schema, not the description, but that's acceptable given the annotations.

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?

The description is two sentences plus a well-placed tip. The main purpose is stated first, followed by practical guidance. The tip is a bit long but packed with useful info (how to get folder ID, partial updates, example). No fluff or repetition; it's efficiently organized.

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

Completeness4/5

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

Given the large, detailed schema and no output schema, the description covers the essentials: what it does, how to get the folder ID, partial-update behavior, and a common scenario. It doesn't mention the confirm gate or return fidelity (excludeResponse, includeHeaders), but those are schema-level. For an update tool with a rich schema, this is reasonably complete.

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

Parameters4/5

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

Schema coverage is 83% (high), so the schema already explains most parameters. The description adds value by explaining how to use the body: 'Send only the properties to change' and gives a common-use example ({ isEnabled: false }). It also reinforces the need for mailFolderId and messageRuleId via the tip. This goes beyond the schema's basic property descriptions.

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

Purpose5/5

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

The description states a specific verb ('change writable properties'), resource ('messageRule object'), and action ('save the changes'). It clearly distinguishes from create-mail-rule (existing rule) and delete-mail-rule, and the sibling list confirms these alternatives exist. The agent knows exactly what this tool does and when to pick it.

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

Usage Guidelines4/5

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

The description gives explicit usage guidance: 'Updates an existing message rule', 'Use the Inbox folder ID (get it from list-mail-folders) for inbox rules', 'Send only the properties to change'. It also provides a concrete example (disabling a rule). It does not explicitly name alternatives (e.g., create-mail-rule) but implies the distinction via 'existing', which is sufficient for most agents.

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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