Update app.py

app.py

@@ -53,7 +53,7 @@ HF_TOKEN = os.getenv("HF_TOKEN", None)
 DEFAULT_VLM_PROMPT = (
     "From the provided face/eye images, compute the required screening features "
     "(pallor, sclera yellowness, redness, mobility metrics, quality checks) "
-    "and output a clean JSON feature vector only."
+    "and output a clean JSON feature vector only with values ranging as probabilities."
 )
 
 # Default LLM prompts / metadata (stricter: force JSON-only output)