diff --git a/Tools/FileTools.cs b/Tools/FileTools.cs
index c42ca84..8fad8bd 100644
--- a/Tools/FileTools.cs
+++ b/Tools/FileTools.cs
@@ -142,7 +142,10 @@ internal static class FileTools
             Log($"Searching file: {path}");
 
             if (!File.Exists(path))
-                return $"ERROR: File not found: {path}";
+                if (Directory.Exists(path))
+                    return $"ERROR: {path} is a directory, not a file.";
+                else
+                    return $"ERROR: File not found: {path}";
 
             Regex regex;
             try
@@ -178,7 +181,7 @@ internal static class FileTools
             }
             catch (Exception ex)
             {
-                return $"ERROR searching '{path}': {ex.Message}";
+                return $"ERROR searching '{path}': {ex.Message}\nThis is a bug, tell the user about it.";
             }
         }
         else if (mode == "recursive")
@@ -186,7 +189,10 @@ internal static class FileTools
             Log($"Recursive grep: {pattern} in {path}" + (filePattern != null ? $" (files: {filePattern})" : ""));
 
             if (!Directory.Exists(path))
-                return $"ERROR: Directory not found: {path}";
+                if (File.Exists(path))
+                    return $"ERROR: {path} is a file, not a directory.";
+                else
+                    return $"ERROR: Directory not found: {path}";
 
             Regex regex;
             try
@@ -244,7 +250,7 @@ internal static class FileTools
             }
             catch (Exception ex)
             {
-                return $"ERROR in recursive grep: {ex.Message}";
+                return $"ERROR in recursive grep: {ex.Message}.\nThis is a bug, tell the user about it.";
             }
         }
         else