diff --git a/chaos_monkey/network/info.py b/chaos_monkey/network/info.py
index 45b733f45..605799ce3 100644
--- a/chaos_monkey/network/info.py
+++ b/chaos_monkey/network/info.py
@@ -11,6 +11,11 @@ from random import randint
 
 
 def get_host_subnets():
+    """
+    Returns a list of subnets visible to host (omitting loopback and auto conf networks)
+    Each subnet item contains the host IP in that network + the subnet.
+    :return: List of dict, keys are "addr" and "subnet"
+    """
     ipv4_nets = [netifaces.ifaddresses(interface)[netifaces.AF_INET]
                  for interface in netifaces.interfaces()
                  if netifaces.AF_INET in netifaces.ifaddresses(interface)
@@ -111,6 +116,11 @@ def get_free_tcp_port(min_range=1000, max_range=65535):
 
 
 def check_internet_access(services):
+    """
+    Checks if any of the services are accessible, over ICMP
+    :param services: List of IPs/hostnames
+    :return: boolean depending on internet access
+    """
     ping_str = "-n 1" if sys.platform.startswith("win") else "-c 1"
     for host in services:
         if os.system("ping " + ping_str + " " + host) == 0:
@@ -119,6 +129,11 @@ def check_internet_access(services):
 
 
 def get_ips_from_interfaces():
+    """
+    Returns a list of IPs accessible in the host in each network interface, in the subnet.
+    Limits to a single class C if the network is larger
+    :return: List of IPs, marked as strings.
+    """
     res = []
     ifs = get_host_subnets()
     for net_interface in ifs:
diff --git a/chaos_monkey/system_info/__init__.py b/chaos_monkey/system_info/__init__.py
index fd1aa807f..b9a16d459 100644
--- a/chaos_monkey/system_info/__init__.py
+++ b/chaos_monkey/system_info/__init__.py
@@ -47,12 +47,18 @@ class InfoCollector(object):
 
     def get_hostname(self):
         """
-        Adds the computer hostname to the system information.
-        :return:
+        Adds the fully qualified computer hostname to the system information.
+        :return: Nothing
         """
         self.info['hostname'] = socket.getfqdn()
 
     def get_process_list(self):
+        """
+        Adds process information from the host to the system information.
+        Currently lists process name, ID, parent ID, command line
+        and the full image path of each process.
+        :return: Nothing
+        """
         processes = {}
         for process in psutil.process_iter():
             try:
@@ -78,7 +84,8 @@ class InfoCollector(object):
     def get_network_info(self):
         """
         Adds network information from the host to the system information.
-        Currently returns a list of networks accessible from host, containing host ip and the subnet range.
+        Currently updates with a list of networks accessible from host,
+        containing host ip and the subnet range.
         :return: None
         """
         self.info['network_info'] = {'networks': get_host_subnets()}