diff --git a/i3pystatus/core/command.py b/i3pystatus/core/command.py
index 42d1bda..af79ce0 100644
--- a/i3pystatus/core/command.py
+++ b/i3pystatus/core/command.py
@@ -7,11 +7,21 @@ CommandResult = namedtuple("Result", ['rc', 'out', 'err'])
 
 def run_through_shell(command, enable_shell=False):
     """
-    Retrieves output of command
-    Returns tuple success (boolean)/ stdout(string) / stderr (string)
+    Retrieve output of a command.
+    Returns a named tuple with three elements:
 
-    Don't use this function with programs that outputs lots of data since the output is saved
-    in one variable
+    * ``rc`` (integer) Return code of command.
+    * ``out`` (string) Everything that was printed to stdout.
+    * ``err`` (string) Everything that was printed to stderr.
+
+    Don't use this function with programs that outputs lots of data since the
+    output is saved in one variable.
+
+    :param command: A string or a list of strings containing the name and
+     arguments of the program.
+    :param enable_shell: If set ot `True` users default shell will be invoked
+     and given ``command`` to execute. The ``command`` should obviously be a
+     string since shell does all the parsing.
     """
 
     if not enable_shell and not isinstance(command, list):