diff --git a/apps/api/.env.example b/apps/api/.env.example
index bee1948c7..0139bfd4f 100644
--- a/apps/api/.env.example
+++ b/apps/api/.env.example
@@ -115,7 +115,9 @@ ILOVEAPI_SECRET_KEY=
 # MINERU_TOKEN_RPM_LIMIT=300
 # MINERU_TOKEN_DAILY_LIMIT=10000
 # MINERU_TOKEN_COOLDOWN_SECONDS=60
-# FORCE_MINERU_UPLOAD_ENABLED=false
+# False prefers S3 URL mode when the source object is reusable. Set true only
+# when MinerU cannot fetch your storage URLs and direct upload is required.
+# MINERU_UPLOAD_MODE_ENABLED=false
 # ILOVEAPI_BASE_URL=https://api.ilovepdf.com/v1
 # ILOVEAPI_TIMEOUT=120
 
diff --git a/apps/worker/.env.example b/apps/worker/.env.example
index 82cf92088..9b3ad9208 100644
--- a/apps/worker/.env.example
+++ b/apps/worker/.env.example
@@ -106,7 +106,9 @@ ILOVEAPI_SECRET_KEY=
 # MINERU_TOKEN_RPM_LIMIT=300
 # MINERU_TOKEN_DAILY_LIMIT=10000
 # MINERU_TOKEN_COOLDOWN_SECONDS=60
-# FORCE_MINERU_UPLOAD_ENABLED=false
+# False prefers S3 URL mode when the source object is reusable. Set true only
+# when MinerU cannot fetch your storage URLs and direct upload is required.
+# MINERU_UPLOAD_MODE_ENABLED=false
 # ILOVEAPI_BASE_URL=https://api.ilovepdf.com/v1
 # ILOVEAPI_TIMEOUT=120
 
@@ -117,4 +119,3 @@ MAX_FILE_SIZE=104857600
 # Legacy parser compatibility fields.
 # ALL_DF_COLS=content,path,type,length,keywords,summary,know_id,tokens,connectto,addtime,page_nums
 # SPLIT_CHAR=/
-
diff --git a/apps/worker/app/services/document_parser/providers/mineru/pdf_service.py b/apps/worker/app/services/document_parser/providers/mineru/pdf_service.py
index 4a3b6ec50..ffaae7af8 100644
--- a/apps/worker/app/services/document_parser/providers/mineru/pdf_service.py
+++ b/apps/worker/app/services/document_parser/providers/mineru/pdf_service.py
@@ -32,10 +32,7 @@
 
 
 def _should_use_mineru_s3_url_mode(s3_key: Optional[str]) -> bool:
-    if settings.FORCE_MINERU_UPLOAD_ENABLED:
-        return False
-
-    return settings.ENVIRONMENT != "development" and s3_key is not None
+    return not settings.MINERU_UPLOAD_MODE_ENABLED and s3_key is not None
 
 
 def _log_mineru_url_mode_storage_fallback(
diff --git a/packages/shared-python/shared/core/config/mineru.py b/packages/shared-python/shared/core/config/mineru.py
index 517e15a9f..1b1a43893 100644
--- a/packages/shared-python/shared/core/config/mineru.py
+++ b/packages/shared-python/shared/core/config/mineru.py
@@ -56,11 +56,12 @@ class MineruConfig(BaseModel):
         default=2,
         description="Backoff factor between upload retries.",
     )
-    FORCE_MINERU_UPLOAD_ENABLED: bool = Field(
+    MINERU_UPLOAD_MODE_ENABLED: bool = Field(
         default=False,
         description=(
-            "Force MinerU direct-upload ingestion and disable S3 URL mode even when "
-            "a reusable source object is available."
+            "Use MinerU direct-upload ingestion instead of S3 URL mode. "
+            "Disabled by default so workers prefer S3 URL mode when a reusable "
+            "source object is available."
         ),
     )
     MINERU_URL_MODE_PRESIGN_EXPIRY: int = Field(