diff --git a/app/Http/Requests/Api/Post/StorePostRequest.php b/app/Http/Requests/Api/Post/StorePostRequest.php
index 303ae8ba..cbdb4c0a 100644
--- a/app/Http/Requests/Api/Post/StorePostRequest.php
+++ b/app/Http/Requests/Api/Post/StorePostRequest.php
@@ -50,7 +50,6 @@ public function rules(): array
                 Rule::in(array_column(ContentType::cases(), 'value')),
                 new ContentTypeMatchesPlatform,
             ],
-            'platforms.*.meta' => ['sometimes', 'nullable', 'array'],
             ...PostPlatformMetaRules::rules(),
             'scheduled_at' => ['nullable', 'date', 'after:now'],
             'label_ids' => ['sometimes', 'array'],
diff --git a/app/Http/Requests/Api/Post/UpdatePostRequest.php b/app/Http/Requests/Api/Post/UpdatePostRequest.php
index 22487d0b..02fa34d0 100644
--- a/app/Http/Requests/Api/Post/UpdatePostRequest.php
+++ b/app/Http/Requests/Api/Post/UpdatePostRequest.php
@@ -52,7 +52,6 @@ public function rules(): array
                 Rule::in(array_column(ContentType::cases(), 'value')),
                 new ContentTypeMatchesPostPlatform,
             ],
-            'platforms.*.meta' => ['nullable', 'array'],
             ...PostPlatformMetaRules::rules(),
             'scheduled_at' => [
                 'nullable',
diff --git a/app/Http/Requests/App/Post/UpdatePostRequest.php b/app/Http/Requests/App/Post/UpdatePostRequest.php
index 29c7343c..c246ff57 100644
--- a/app/Http/Requests/App/Post/UpdatePostRequest.php
+++ b/app/Http/Requests/App/Post/UpdatePostRequest.php
@@ -70,7 +70,6 @@ public function rules(): array
                 Rule::in(array_column(ContentType::cases(), 'value')),
                 Rule::when($enforcesMediaCompatibility, [new ContentTypeCompatibleWithMedia]),
             ],
-            'platforms.*.meta' => ['nullable', 'array'],
             ...PostPlatformMetaRules::rules(),
             'label_ids' => ['sometimes', 'array'],
             'label_ids.*' => ['uuid', Rule::exists('workspace_labels', 'id')->where('workspace_id', $this->user()->currentWorkspace->id)],
diff --git a/app/Mcp/Tools/Post/CreatePostTool.php b/app/Mcp/Tools/Post/CreatePostTool.php
index 2fb51f25..80851f06 100644
--- a/app/Mcp/Tools/Post/CreatePostTool.php
+++ b/app/Mcp/Tools/Post/CreatePostTool.php
@@ -38,7 +38,6 @@ public function handle(Request $request): ResponseFactory
                     ->where('is_active', true),
             ],
             'platforms.*.content_type' => ['required', 'string', Rule::in(array_column(ContentType::cases(), 'value')), new ContentTypeMatchesPlatform],
-            'platforms.*.meta' => ['sometimes', 'array'],
             ...PostPlatformMetaRules::rules(),
         ]);
 
diff --git a/app/Mcp/Tools/Post/UpdatePostTool.php b/app/Mcp/Tools/Post/UpdatePostTool.php
index aa0903ca..055b5942 100644
--- a/app/Mcp/Tools/Post/UpdatePostTool.php
+++ b/app/Mcp/Tools/Post/UpdatePostTool.php
@@ -49,7 +49,6 @@ public function handle(Request $request): Response|ResponseFactory
                 Rule::exists('post_platforms', 'id')->where('post_id', $post->id),
             ],
             'platforms.*.content_type' => ['sometimes', 'string', Rule::in(array_column(ContentType::cases(), 'value')), new ContentTypeMatchesPostPlatform],
-            'platforms.*.meta' => ['sometimes', 'array'],
             ...PostPlatformMetaRules::rules(),
         ]);
 
diff --git a/app/Support/PostPlatformMetaRules.php b/app/Support/PostPlatformMetaRules.php
index 65529b47..d7a12682 100644
--- a/app/Support/PostPlatformMetaRules.php
+++ b/app/Support/PostPlatformMetaRules.php
@@ -32,14 +32,16 @@ class PostPlatformMetaRules
     ];
 
     /**
-     * Validation rules for the `platforms.*.meta.*` keys. The caller keeps its own
-     * `platforms.*.meta` (array) parent rule; these are the per-platform sub-keys.
+     * Validation rules for `platforms.*.meta` and all its per-platform sub-keys.
+     * Spread into a FormRequest/MCP tool rule set as the complete meta contract.
      *
      * @return array<string, mixed>
      */
     public static function rules(): array
     {
         return [
+            'platforms.*.meta' => ['sometimes', 'nullable', 'array'],
+
             // Instagram / Facebook
             'platforms.*.meta.aspect_ratio' => ['sometimes', 'nullable', 'string', Rule::enum(AspectRatio::class)],