diff --git a/man/man1/notmuch-reply.1 b/man/man1/notmuch-reply.1
index 454bdee3..bf2021f5 100644
--- a/man/man1/notmuch-reply.1
+++ b/man/man1/notmuch-reply.1
@@ -89,9 +89,12 @@ user's addresses.
 
 Decrypt any MIME encrypted parts found in the selected content
 (ie. "multipart/encrypted" parts). Status of the decryption will be
-reported (currently only supported with --format=json and --format=sexp)
-and the multipart/encrypted part will be replaced by the decrypted
-content.
+reported (currently only supported with --format=json and
+--format=sexp) and on successful decryption the multipart/encrypted
+part will be replaced by the decrypted content.
+
+Decryption expects a functioning \fBgpg-agent\fR(1) to provide any
+needed credentials. Without one, the decryption will fail.
 .RE
 
 See \fBnotmuch-search-terms\fR(7)
diff --git a/man/man1/notmuch-show.1 b/man/man1/notmuch-show.1
index 8be9eaec..7697dfcc 100644
--- a/man/man1/notmuch-show.1
+++ b/man/man1/notmuch-show.1
@@ -163,8 +163,13 @@ will be replaced by the signed data.
 Decrypt any MIME encrypted parts found in the selected content
 (ie. "multipart/encrypted" parts). Status of the decryption will be
 reported (currently only supported with --format=json and
---format=sexp) and the multipart/encrypted part will be replaced
-by the decrypted content.  Implies --verify.
+--format=sexp) and on successful decryption the multipart/encrypted
+part will be replaced by the decrypted content.
+
+Decryption expects a functioning \fBgpg-agent\fR(1) to provide any
+needed credentials. Without one, the decryption will fail.
+
+Implies --verify.
 .RE
 
 .RS 4