diff --git a/app/Enums/SocialAccount/Platform.php b/app/Enums/SocialAccount/Platform.php
index 25f2b743..73629c8f 100644
--- a/app/Enums/SocialAccount/Platform.php
+++ b/app/Enums/SocialAccount/Platform.php
@@ -149,6 +149,10 @@ public function altTextMaxLength(): ?int
         };
     }
 
+    /**
+     * Whether the platform's API accepts image alt text (accessibility
+     * description) on published media.
+     */
     public function supportsAltText(): bool
     {
         return $this->altTextMaxLength() !== null;
diff --git a/app/Services/Social/Discord/DiscordPublisher.php b/app/Services/Social/Discord/DiscordPublisher.php
index d741d01f..f4d88a60 100644
--- a/app/Services/Social/Discord/DiscordPublisher.php
+++ b/app/Services/Social/Discord/DiscordPublisher.php
@@ -129,7 +129,9 @@ private function sendWithMedia(string $channelId, array $payload, Collection $me
 
                 $attachment = ['id' => $index, 'filename' => $filename];
 
-                if ($alt = $item->altText()) {
+                $alt = $item->altText();
+
+                if ($alt !== null) {
                     $attachment['description'] = mb_substr($alt, 0, Platform::Discord->altTextMaxLength());
                 }
 
diff --git a/app/Services/Social/FacebookPublisher.php b/app/Services/Social/FacebookPublisher.php
index 6f351b9f..6386bb1b 100644
--- a/app/Services/Social/FacebookPublisher.php
+++ b/app/Services/Social/FacebookPublisher.php
@@ -136,7 +136,9 @@ private function publishSingleImagePost(string $pageId, string $accessToken, ?st
             $payload['message'] = $content;
         }
 
-        if ($alt = $this->altFor($media)) {
+        $alt = $this->altFor($media);
+
+        if ($alt !== null) {
             $payload['alt_text_custom'] = $alt;
         }
 
@@ -175,7 +177,9 @@ private function publishMultiImagePost(string $pageId, string $accessToken, ?str
                 'access_token' => $accessToken,
             ];
 
-            if ($alt = $this->altFor($media)) {
+            $alt = $this->altFor($media);
+
+            if ($alt !== null) {
                 $uploadPayload['alt_text_custom'] = $alt;
             }
 
diff --git a/app/Services/Social/InstagramPublisher.php b/app/Services/Social/InstagramPublisher.php
index bd751bdd..2fe669f6 100644
--- a/app/Services/Social/InstagramPublisher.php
+++ b/app/Services/Social/InstagramPublisher.php
@@ -89,7 +89,9 @@ private function publishSingleImage(string $instagramId, string $accessToken, ?s
             'access_token' => $accessToken,
         ];
 
-        if ($alt = $this->altFor($media)) {
+        $alt = $this->altFor($media);
+
+        if ($alt !== null) {
             $params['alt_text'] = $alt;
         }
 
@@ -215,7 +217,9 @@ private function publishCarousel(string $instagramId, string $accessToken, ?stri
             } else {
                 $params['image_url'] = $this->cropImageForAspectRatio($media->url, $aspectRatio);
 
-                if ($alt = $this->altFor($media)) {
+                $alt = $this->altFor($media);
+
+                if ($alt !== null) {
                     $params['alt_text'] = $alt;
                 }
             }
diff --git a/app/Services/Social/ThreadsPublisher.php b/app/Services/Social/ThreadsPublisher.php
index e5bf968b..89f87cfc 100644
--- a/app/Services/Social/ThreadsPublisher.php
+++ b/app/Services/Social/ThreadsPublisher.php
@@ -109,7 +109,9 @@ private function publishImagePost(string $userId, string $accessToken, ?string $
             'access_token' => $accessToken,
         ];
 
-        if ($alt = $this->altFor($media)) {
+        $alt = $this->altFor($media);
+
+        if ($alt !== null) {
             $params['alt_text'] = $alt;
         }
 
@@ -193,7 +195,9 @@ private function publishCarousel(string $userId, string $accessToken, ?string $c
                 $params['media_type'] = 'IMAGE';
                 $params['image_url'] = $media->url;
 
-                if ($alt = $this->altFor($media)) {
+                $alt = $this->altFor($media);
+
+                if ($alt !== null) {
                     $params['alt_text'] = $alt;
                 }
             }