Added value: +{
+  "description": "only messages sent at or after this time: RFC3339 with a zone (2026-10-01T09:00:00+03:00) or a date (2026-10-01 = midnight UTC); omit for no lower bound",
+  "type": "string"
+}

Added value: +{
+  "description": "only messages sent BEFORE this time — exclusive, so all of 1 October is since 2026-10-01 until 2026-10-02; same formats as since; omit for no upper bound",
+  "type": "string"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "the account this conversation was read from",
+  "properties": {
+    "account_id": {
+      "description": "the id to pass to other wa_ tools",
+      "type": "string"
+    },
+    "name": {
+      "description": "the account's WhatsApp display name",
+      "type": "string"
+    },
+    "phone": {
+      "description": "the account's phone number, E.164",
+      "type": "string"
+    }
+  },
+  "required": [
+    "account_id"
+  ],
+  "type": [
+    "null",
+    "object"
+  ]
+}

Added value: +{
+  "description": "true when older messages match than were returned; page them with wa_list_messages(account_id, chat, since, until, include_history=true)",
+  "type": "boolean"
+}

Added value: +{
+  "description": "the WhatsApp display name of that account",
+  "type": "string"
+}

Added value: +{
+  "description": "the phone number of your account this message was sent from or received on, E.164",
+  "type": "string"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "present on an image, video, audio, document or sticker message: the file's mime type, size and name; fetch the bytes with wa_get_media",
+  "properties": {
+    "available": {
+      "description": "true when the file should be fetchable with wa_get_media(account_id, message_id) — a live received attachment; false for history and for files you sent, which are not kept",
+      "type": "boolean"
+    },
+    "file_name": {
+      "description": "documents only: the file name the sender gave it",
+      "type": "string"
+    },
+    "mime": {
+      "description": "the attachment's mime type as the sender declared it, e.g. image/jpeg or application/pdf; empty for a message stored before this was recorded",
+      "type": "string"
+    },
+    "size": {
+      "description": "the attachment's size in bytes as the sender declared it; 0 when unknown",
+      "type": "integer"
+    }
+  },
+  "required": [
+    "available"
+  ],
+  "type": [
+    "null",
+    "object"
+  ]
+}

Added value: +{
+  "description": "when this server received and stored the message, RFC3339; later than at for a message delivered late or loaded as history",
+  "type": "string"
+}

Added value: +{
+  "description": "who wrote the message, by name: for inbound the sender's name as saved in this account's contacts, or else the name they chose for themselves; for outbound this account's own WhatsApp name. Empty when no name is known",
+  "type": "string"
+}

Added value: +{
+  "description": "delivery status of an outbound message from the provider's receipts: sent, delivered, read or failed; empty when no receipt has arrived (or for inbound). Only Business (Cloud API) numbers report this today",
+  "type": "string"
+}

Added value: +{
+  "description": "read ONE conversation — a phone number or a group JID — including history loaded with wa_load_history; omit for the account's most recent messages across all chats",
+  "type": "string"
+}

Added value: +{
+  "description": "true for a message loaded as history (pairing sync or wa_load_history) rather than received live",
+  "type": "boolean"
+}