Updated from Slack docs, 2025/03/19

Author: Slack API Ref Buildbot

methods/chat/chat.postMessage.json

@@ -30,6 +30,10 @@
       "desc": "How this field works and whether it is required depends on other fields you use in your API call. See below for more detail.",
       "type": "string"
     },
+    "agent_message_source_type": {
+      "required": false,
+      "desc": "Identify how the message was posted for agentforce BE logging."
+    },
     "as_user": {
       "required": false,
       "example": "true",

methods/files/files.completeUploadExternal.json

@@ -13,7 +13,7 @@
     "blocks": {
       "required": false,
       "example": "[{\"type\": \"section\", \"text\": {\"type\": \"plain_text\", \"text\": \"Hello world\"}}]",
-      "desc": "A JSON-based array of structured blocks, presented as a URL-encoded string. If the initial_comment field is provided, the blocks field is ignored.",
+      "desc": "A JSON-based array of structured rich text blocks, presented as a URL-encoded string. If the initial_comment field is provided, the blocks field is ignored.",
       "type": "blocks[] as string",
       "format": "json"
     },