diff --git a/Cargo.toml b/Cargo.toml
index 51a69c6..0aeb273 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zcash_note_encryption"
-description = "TBD"
+description = "Note encryption for Zcash transactions"
 version = "0.0.0"
 authors = [
     "Jack Grigg <jack@electriccoin.co>",
diff --git a/src/lib.rs b/src/lib.rs
index 0c3a01e..9587033 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,16 @@
-//! Implementation of in-band secret distribution abstractions
-//! for Zcash transactions. The implementations here provide
-//! functionality that is shared between the Sapling and Orchard
-//! protocols.
+//! Note encryption for Zcash transactions.
+//!
+//! This crate implements the [in-band secret distribution scheme] for the Sapling and
+//! Orchard protocols. It provides reusable methods that implement common note encryption
+//! and trial decryption logic, and enforce protocol-agnostic verification requirements.
+//!
+//! Protocol-specific logic is handled via the [`Domain`] trait. Implementations of this
+//! trait are provided in the [`zcash_primitives`] (for Sapling) and [`orchard`] crates;
+//! users with their own existing types can similarly implement the trait themselves.
+//!
+//! [in-band secret distribution scheme]: https://zips.z.cash/protocol/protocol.pdf#saplingandorchardinband
+//! [`zcash_primitives`]: https://crates.io/crates/zcash_primitives
+//! [`orchard`]: https://crates.io/crates/orchard
 
 #![no_std]
 #![cfg_attr(docsrs, feature(doc_cfg))]