[Docs] update descriptions for tools (#270)

tools/case_analyzer.py

@@ -13,7 +13,7 @@ from opencompass.utils import build_dataset_from_cfg, get_infer_output_path
 
 
 def parse_args():
-    parser = argparse.ArgumentParser(description='Run an evaluation task')
+    parser = argparse.ArgumentParser(description='Run case analyzer')
     parser.add_argument('config', help='Train config file path')
     parser.add_argument(
         '-f',

tools/prediction_merger.py

@@ -10,7 +10,8 @@ from opencompass.utils import build_dataset_from_cfg, get_infer_output_path
 
 
 def parse_args():
-    parser = argparse.ArgumentParser(description='Run an evaluation task')
+    parser = argparse.ArgumentParser(
+        description='Merge patitioned predictions')
     parser.add_argument('config', help='Train config file path')
     parser.add_argument('-w',
                         '--work-dir',

tools/prompt_viewer.py

@@ -13,7 +13,8 @@ from opencompass.utils import (Menu, build_dataset_from_cfg,
 
 
 def parse_args():
-    parser = argparse.ArgumentParser(description='Run an evaluation task')
+    parser = argparse.ArgumentParser(
+        description='View generated prompts based on datasets (and models)')
     parser.add_argument('config', help='Train config file path')
     parser.add_argument('-n', '--non-interactive', action='store_true')
     parser.add_argument('-a', '--all', action='store_true')