- Decryption expects a functioning **gpg-agent(1)** to provide any
- needed credentials. Without one, the decryption will fail.
+ If ``true``, decrypt any MIME encrypted parts found in the
+ selected content (i.e., "multipart/encrypted" parts). Status
+ of the decryption will be 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.
+
+ If ``auto``, and a session key is already known for the
+ message, then it will be decrypted, but notmuch will not try
+ to access the user's secret keys.
+
+ Use ``false`` to avoid even automatic decryption.
+
+ Non-automatic decryption expects a functioning
+ **gpg-agent(1)** to provide any needed credentials. Without
+ one, the decryption will likely fail.
+
+ Default: ``auto``