diff --git a/swh/cloner/git/producer/clones.py b/swh/cloner/git/producer/clones.py
index 30235bc..245726d 100644
--- a/swh/cloner/git/producer/clones.py
+++ b/swh/cloner/git/producer/clones.py
@@ -1,68 +1,75 @@
 # Copyright (C) 2015  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import logging
 
 from swh.cloner.git.storage import db, models
 from swh.cloner.git.worker import tasks
 
 
 def just_print_repos(repository_scheme, repos):
     """Only print what should be posted in queue.
 
     Args:
         repository_scheme: not used
         repos: Generator of tuple repository id, repository name to print.
 
     Returns:
         None
 
     Raises:
         None
 
     """
     print('This is a dry run, will only display the repositories to load...')
     for (repo_id, repo_name) in repos:
         print('load repo %s into queue' % repo_name)
 
 
 def post_to_task_queue(repository_scheme, repos):
     """Load repositories to queue.
 
     Args:
         Generator of repository to print.
 
     Returns:
         None
 
     Raises:
         None
 
     """
     for (repo_id, repo_name) in repos:
         logging.info('load repo %s into queue' % repo_name)
         repo_url = repository_scheme % repo_name
         model_data = {'repo_id': repo_id,
                       'repo_url': repo_url,
                       'repo_name': repo_name}
         tasks.orchestrate_clone_with_measure.delay(model_data)
 
 
 _run_fn = {
     True : just_print_repos
 }
 
+
 def produce(conf):
-    """Make workers clone repositories.
+    """Produce a list of repositories to clone in the queue.
+
+    Args:
+        conf: a dictionary of setup
+          - db_url: the setup string to access the db
+          - dry_run: optional flag setup by cli to avoid actually producing real messages
+          - repository_scheme: the uri to use for cloning repositories
     """
     db_url = conf['db_url']
     dry_run = conf['dry_run']
     repository_scheme = conf['repository_scheme']
 
     run_fn = _run_fn.get(dry_run, post_to_task_queue)
 
     with db.connect(db_url) as db_conn:
         repos = models.load_repos(db_conn)
         run_fn(repository_scheme, repos)