diff --git a/monkey/infection_monkey/credential_repository/aggregating_propagation_credentials_repository.py b/monkey/infection_monkey/credential_repository/aggregating_propagation_credentials_repository.py
index 054428d59..f347b901c 100644
--- a/monkey/infection_monkey/credential_repository/aggregating_propagation_credentials_repository.py
+++ b/monkey/infection_monkey/credential_repository/aggregating_propagation_credentials_repository.py
@@ -33,10 +33,18 @@ class AggregatingPropagationCredentialsRepository(IPropagationCredentialsReposit
                 self._add_secret(credentials.secret)
 
     def _add_identity(self, identity: ICredentialComponent):
+        """
+        Stores identity component to the repository
+        :param identity: Identity credential component
+        """
         if identity.credential_type is CredentialComponentType.USERNAME:
             self._stored_credentials.setdefault("exploit_user_list", set()).add(identity.username)
 
     def _add_secret(self, secret: ICredentialComponent):
+        """
+        Stores secret component to the repository
+        :param secret: Secret credential component
+        """
         if secret.credential_type is CredentialComponentType.PASSWORD:
             self._stored_credentials.setdefault("exploit_password_list", set()).add(secret.password)
         elif secret.credential_type is CredentialComponentType.LM_HASH:
@@ -61,9 +69,18 @@ class AggregatingPropagationCredentialsRepository(IPropagationCredentialsReposit
 
     @request_cache(CREDENTIALS_POLL_PERIOD_SEC)
     def _get_credentials_from_control_channel(self) -> Sequence[Credentials]:
+        """
+        Fetches credentials from control channel
+        :return: Credentials that can be used for propagation
+        """
         return self._control_channel.get_credentials_for_propagation()
 
     def _set_attribute(self, attribute_to_be_set: str, credentials_values: Iterable[Any]):
+        """
+        Sets a value for a credential type
+        :param attribute_to_be_set: Key of self._stored_credentials (credential container key)
+        :param credentials_values: Value we want to set the container to
+        """
         if not credentials_values:
             return
 
diff --git a/monkey/infection_monkey/credential_repository/i_propagation_credentials_repository.py b/monkey/infection_monkey/credential_repository/i_propagation_credentials_repository.py
index be110476f..7e5d20dab 100644
--- a/monkey/infection_monkey/credential_repository/i_propagation_credentials_repository.py
+++ b/monkey/infection_monkey/credential_repository/i_propagation_credentials_repository.py
@@ -10,7 +10,7 @@ class IPropagationCredentialsRepository(metaclass=abc.ABCMeta):
     def add_credentials(self, credentials_to_add: Iterable[Credentials]):
         """
         Adds credentials to the CredentialStore
-        :param Iterable[Credentials] credentials: The credentials that will be added
+        :param Iterable[Credentials] credentials_to_add: The credentials that will be added
         """
 
     @abc.abstractmethod