diff --git a/tools/file_read b/tools/file_read
index 55da563..1cc84cf 100644
--- a/tools/file_read
+++ b/tools/file_read
@@ -61,6 +61,10 @@ with open(file_path, 'rb') as f:
             print("(binary file)")
         sys.exit(0)
 
+# Count total lines
+with open(file_path, 'r', errors='replace') as f:
+    total_lines = sum(1 for _ in f)
+
 start = max(1, start)
 if head:
     end = start + head - 1
@@ -76,10 +80,10 @@ with open(file_path, 'r', errors='replace') as f:
 
 if not segment_lines:
     if start == 1:
-        print("STATUS=ok EMPTY=true")
+        print(f"STATUS=ok LINES=0 TOTAL_LINES={total_lines} TRUNCATED=false EMPTY=true")
         print("(empty file)")
     else:
-        print("STATUS=ok EMPTY=true")
+        print(f"STATUS=ok LINES=0 TOTAL_LINES={total_lines} TRUNCATED=false EMPTY=true")
         print("(no lines in range)")
     sys.exit(0)
 
@@ -91,5 +95,7 @@ for i, line in enumerate(segment_lines):
         text = text[:MAX_LINE_LEN] + '...'
     out.append(f"{lineno:>6}\t{text}")
 
-print(f"STATUS=ok LINES={len(out)}")
+last_line_shown = start + len(out) - 1
+truncated = last_line_shown < total_lines
+print(f"STATUS=ok LINES={len(out)} TOTAL_LINES={total_lines} TRUNCATED={str(truncated).lower()}")
 print('\n'.join(out))