diff --git a/comfy_api_nodes/nodes_gemini.py b/comfy_api_nodes/nodes_gemini.py
index 019cdd753..ae7b04846 100644
--- a/comfy_api_nodes/nodes_gemini.py
+++ b/comfy_api_nodes/nodes_gemini.py
@@ -382,7 +382,7 @@ class GeminiInputFiles(ComfyNodeABC):
                 "file": (
                     IO.COMBO,
                     {
-                        "tooltip": "Input files to include as context for the model.",
+                        "tooltip": "Input files to include as context for the model. Only accepts text (.txt) and PDF (.pdf) files for now.",
                         "options": input_files,
                         "default": input_files[0] if input_files else None,
                     },
diff --git a/comfy_api_nodes/nodes_openai.py b/comfy_api_nodes/nodes_openai.py
index 85cd3cf5a..be1d2de4a 100644
--- a/comfy_api_nodes/nodes_openai.py
+++ b/comfy_api_nodes/nodes_openai.py
@@ -885,7 +885,7 @@ class OpenAIInputFiles(ComfyNodeABC):
                 "file": (
                     IO.COMBO,
                     {
-                        "tooltip": "Input files to include as context for the model.",
+                        "tooltip": "Input files to include as context for the model. Only accepts text (.txt) and PDF (.pdf) files for now.",
                         "options": input_files,
                         "default": input_files[0] if input_files else None,
                     },