diff --git a/docs/pt-mongodb-query-digest.rst b/docs/pt-mongodb-query-digest.rst
index abc3a0be..36edcf7c 100644
--- a/docs/pt-mongodb-query-digest.rst
+++ b/docs/pt-mongodb-query-digest.rst
@@ -24,6 +24,10 @@ The fingerprint is calculated as a sorted list of keys in the document
 with a maximum depth level of 10.
 By default, the results are sorted by ascending query count.
 
+.. note:: ``pt-mongodb-query-digest`` cannot collect statistics
+   from MongoDB instances that require connection via SSL.
+   Support for SSL will be added in the future.
+
 Options
 -------
 
diff --git a/docs/pt-mongodb-summary.rst b/docs/pt-mongodb-summary.rst
index 9267a0e9..e5b0b074 100644
--- a/docs/pt-mongodb-summary.rst
+++ b/docs/pt-mongodb-summary.rst
@@ -20,6 +20,13 @@ it will try to connect to ``localhost`` on port ``27017``.
 The program collects information about MongoDB instances
 by running administration commands and formatting the output.
 
+.. note:: ``pt-mongodb-summary`` requires to be run by user
+   with the ``clusterAdmin`` or ``root`` built-in roles.
+
+.. note:: ``pt-mongodb-summary`` cannot collect statistics
+   from MongoDB instances that require connection via SSL.
+   Support for SSL will be added in the future.
+
 Options
 -------