Added value: +"Owner-bound draftId from search_post_drafts/create_post_draft; same as postId."

Previous value: -"Interactive card attachment and fallback instructions. attachedToThisResult means this response already supplies the card; do not automatically call show_post_card again. Host support determines actual rendering."New value: +"Card attachment/fallback. attachedToThisResult supplies the card: do not auto-call show_post_card. Rendering depends on host support."

Previous value: -"Composed publication including the selected auto-signature. Edit documentJson, never copy this composition into the post body."New value: +"Composed delivery with signature. Edit documentJson; never copy this composition into the post body."

Previous value: -"Index of the native image in this response's content array; null when unavailable."New value: +"Native image index in response content; null if unavailable."

Previous value: -"Ready-to-use inline image Markdown for the final answer where the host permits remote images. Preserve the leading !."New value: +"Final-answer image Markdown where host allows remote images; keep leading !."

Previous value: -"How to include the screenshot in the final user-facing answer; a tool-only image or ordinary link is insufficient."New value: +"Screenshot display instructions for the final answer; tool-only images/ordinary links are insufficient."

Previous value: -"Filename suggestion for a host-supported attachment made from the returned bytes; not an existing local path."New value: +"Suggested attachment name for returned bytes; not an existing path."

Previous value: -"Present only when image inputs were validated and imported into durable storage during this call. It does not describe arbitrary external document media."New value: +"Present only for images validated and durably imported in this call; excludes arbitrary external document media."

Added value: +"inherit follows defaults (channel/post only); none disables the optional signature; custom requires signatureId."

Added value: +"Owner-bound signatureId from list_signatures/create_signature."

Previous value: -"Interactive card availability and fallback instructions. Host UI support determines whether a card can render; preview links remain available."New value: +"Interactive card attachment and fallback instructions. attachedToThisResult means this response already supplies the card; do not automatically call show_post_card again. Host support determines actual rendering."

Added value: +{
+  "additionalProperties": false,
+  "description": "Optional formatting ideas. They do not affect validation, publication or user consent. The user's choice always takes priority.",
+  "properties": {
+    "advisory": {
+      "const": true,
+      "type": "boolean"
+    },
+    "decisionOwner": {
+      "const": "user",
+      "type": "string"
+    },
+    "instruction": {
+      "type": "string"
+    },
+    "items": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "blockPaths": {
+            "items": {
+              "type": "string"
+            },
+            "maxItems": 5,
+            "type": "array"
+          },
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "recommendation": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message",
+          "recommendation",
+          "blockPaths"
+        ],
+        "type": "object"
+      },
+      "maxItems": 4,
+      "type": "array"
+    }
+  },
+  "required": [
+    "advisory",
+    "decisionOwner",
+    "instruction",
+    "items"
+  ],
+  "type": "object"
+}

Added value: +{
+  "description": "Interactive card availability and fallback instructions. Host UI support determines whether a card can render; preview links remain available.",
+  "type": "object"
+}

Added value: +{
+  "description": "Present only when image inputs were validated and imported into durable storage during this call. It does not describe arbitrary external document media.",
+  "enum": [
+    "imported"
+  ],
+  "type": "string"
+}

Added value: +{
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}

Added value: +{
+  "minimum": 1,
+  "type": "integer"
+}

Added value: +{
+  "description": "Preview this owner-bound channel's auto-signature. Without a channel use the account default or post override.",
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}

Added value: +{
+  "maxLength": 128,
+  "type": [
+    "string",
+    "null"
+  ]
+}

Added value: +{
+  "description": "Composed publication including the selected auto-signature. Edit documentJson, never copy this composition into the post body.",
+  "type": "object"
+}

Added value: +{
+  "items": {
+    "anyOf": [
+      {
+        "type": "object"
+      },
+      {
+        "items": {
+          "type": "object"
+        },
+        "type": "array"
+      }
+    ]
+  },
+  "type": "array"
+}

Added value: +[
+  {
+    "type": "object"
+  },
+  {
+    "items": {
+      "type": "object"
+    },
+    "type": "array"
+  }
+]

Removed value: -"object"

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "mode": {
+      "enum": [
+        "inherit",
+        "none",
+        "custom"
+      ],
+      "type": "string"
+    },
+    "signatureId": {
+      "maxLength": 128,
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "mode"
+  ],
+  "type": "object"
+}

Added value: +{
+  "type": [
+    "object",
+    "null"
+  ]
+}