diff --git a/wa/framework/target/descriptor.py b/wa/framework/target/descriptor.py
index 3954283c..6cf3d8c4 100644
--- a/wa/framework/target/descriptor.py
+++ b/wa/framework/target/descriptor.py
@@ -317,6 +317,8 @@ CONNECTION_PARAMS = {
             'password', kind=str,
             description="""
             Password to use.
+            (When connecting to a passwordless machine set to an
+            empty string to prevent attempting ssh key authentication.)
             """),
         Parameter(
             'keyfile', kind=str,