diff --git a/libraries/nestjs-libraries/src/chat/tools/integration.schedule.post.ts b/libraries/nestjs-libraries/src/chat/tools/integration.schedule.post.ts
index 19433a7fae..fdc9df735b 100644
--- a/libraries/nestjs-libraries/src/chat/tools/integration.schedule.post.ts
+++ b/libraries/nestjs-libraries/src/chat/tools/integration.schedule.post.ts
@@ -16,6 +16,38 @@ import {
 const validUrlExtension = new ValidUrlExtension();
 const validUrlPath = new ValidUrlPath();
 
+// Settings the agent tends to guess when the schema gives it no guidance —
+// fill them explicitly so an omitted key never lands on a surprising value
+// (e.g. TikTok UPLOAD sends the post to the user's app inbox instead of
+// publishing it).
+export const PROVIDER_SETTINGS_DEFAULTS: Record<string, Record<string, any>> =
+  {
+    tiktok: { content_posting_method: 'DIRECT_POST' },
+  };
+
+export const buildSettings = (
+  providerIdentifier: string,
+  settings: { key: string; value: any }[],
+  base: AllProvidersSettings
+): AllProvidersSettings => {
+  const merged = settings.reduce(
+    (acc: AllProvidersSettings, s: { key: string; value: any }) => ({
+      ...acc,
+      [s.key]: s.value,
+    }),
+    base
+  );
+
+  const defaults = PROVIDER_SETTINGS_DEFAULTS[providerIdentifier] || {};
+  for (const [key, value] of Object.entries(defaults)) {
+    if ((merged as any)[key] === undefined || (merged as any)[key] === '') {
+      (merged as any)[key] = value;
+    }
+  }
+
+  return merged;
+};
+
 // Same URL validation as MediaDto (valid.url.path) - each attachment must
 // point to an allowed upload domain and a supported file extension.
 const attachmentUrl = z
@@ -147,11 +179,9 @@ If the tools return errors, you would need to rerun it with the right parameters
 
           // Same server-side validation as the dashboard / public API
           // (settings DTO + media checkValidity + empty / too-long content).
-          const settings = platform.settings.reduce(
-            (acc: AllProvidersSettings, s: { key: string; value: any }) => ({
-              ...acc,
-              [s.key]: s.value,
-            }),
+          const settings = buildSettings(
+            integrations[platform.integrationId]?.providerIdentifier || '',
+            platform.settings,
             {} as AllProvidersSettings
           );
 
@@ -216,11 +246,9 @@ If the tools return errors, you would need to rerun it with the right parameters
               {
                 integration,
                 group: makeId(10),
-                settings: post.settings.reduce(
-                  (acc: AllProvidersSettings, s: { key: string; value: any }) => ({
-                    ...acc,
-                    [s.key]: s.value,
-                  }),
+                settings: buildSettings(
+                  integration.providerIdentifier,
+                  post.settings,
                   {
                     __type: integration.providerIdentifier,
                   } as AllProvidersSettings
diff --git a/libraries/nestjs-libraries/src/dtos/posts/providers-settings/tiktok.dto.ts b/libraries/nestjs-libraries/src/dtos/posts/providers-settings/tiktok.dto.ts
index 8417315f86..d36ccffe93 100644
--- a/libraries/nestjs-libraries/src/dtos/posts/providers-settings/tiktok.dto.ts
+++ b/libraries/nestjs-libraries/src/dtos/posts/providers-settings/tiktok.dto.ts
@@ -1,6 +1,7 @@
 import {
   IsBoolean, ValidateIf, IsIn, IsString, MaxLength, IsOptional
 } from 'class-validator';
+import { JSONSchema } from 'class-validator-jsonschema';
 
 export class TikTokDto {
   @ValidateIf((p) => p.title)
@@ -44,5 +45,12 @@ export class TikTokDto {
 
   @IsIn(['DIRECT_POST', 'UPLOAD'])
   @IsString()
+  @JSONSchema({
+    description:
+      'Required. Use "DIRECT_POST" to actually publish the post to TikTok. ' +
+      '"UPLOAD" does NOT publish: it only sends the media to the user\'s TikTok app inbox, ' +
+      'where they must manually finish and publish it within 24 hours or it is discarded. ' +
+      'Only use "UPLOAD" when the user explicitly asks to review or edit the post inside the TikTok app before publishing.',
+  })
   content_posting_method: 'DIRECT_POST' | 'UPLOAD';
 }
diff --git a/libraries/nestjs-libraries/src/integrations/social/tiktok.provider.ts b/libraries/nestjs-libraries/src/integrations/social/tiktok.provider.ts
index 87be989289..89a2bbf259 100644
--- a/libraries/nestjs-libraries/src/integrations/social/tiktok.provider.ts
+++ b/libraries/nestjs-libraries/src/integrations/social/tiktok.provider.ts
@@ -19,7 +19,9 @@ import { Integration } from '@prisma/client';
 import { Rules } from '@gitroom/nestjs-libraries/chat/rules.description.decorator';
 
 @Rules(
-  'TikTok can have one video or one picture or multiple pictures, it cannot be without an attachment'
+  'TikTok can have one video or one picture or multiple pictures, it cannot be without an attachment. ' +
+    'For the "content_posting_method" setting always use "DIRECT_POST" unless the user explicitly asks to review or edit the post inside the TikTok app before publishing. ' +
+    '"UPLOAD" does NOT publish the post: it only sends it to the user\'s TikTok app inbox, where they must manually complete it within 24 hours or it is discarded.'
 )
 export class TiktokProvider extends SocialAbstract implements SocialProvider {
   identifier = 'tiktok';