diff --git a/src/options.rs b/src/options.rs
index 7f77d4ff69..352127f87f 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -8,20 +8,20 @@ use {
 pub(crate) struct Options {
   #[clap(
     long,
-    help = "Limit the ordinal index to <MAX_INDEX_SIZE> bytes. [mainnet, testnet, and signet default: 1 TiB, regtest default: 10 MiB]"
+    help = "Limit the ordinal index to <MAX_INDEX_SIZE> bytes. This cannot be changed later. [mainnet, testnet, and signet default: 1 TiB, regtest default: 10 MiB]"
   )]
   max_index_size: Option<Bytes>,
-  #[clap(long)]
+  #[clap(long, help = "Load Bitcoin Core RPC cookie file from <COOKIE_FILE>.")]
   cookie_file: Option<PathBuf>,
-  #[clap(long)]
+  #[clap(long, help = "Connect to Bitcoin Core RPC at <RPC_URL>.")]
   rpc_url: Option<String>,
-  #[clap(long, arg_enum, default_value = "mainnet")]
+  #[clap(long, arg_enum, default_value = "mainnet", help = "Index <CHAIN>.")]
   pub(crate) chain: Chain,
-  #[clap(long)]
+  #[clap(long, help = "Store index in <DATA_DIR>.")]
   data_dir: Option<PathBuf>,
-  #[clap(long)]
+  #[clap(long, help = "Load Bitcoin Core data dir from <BITCOIN_DATA_DIR>.")]
   bitcoin_data_dir: Option<PathBuf>,
-  #[clap(long)]
+  #[clap(long, help = "Limit index to <HEIGHT_LIMIT> blocks.")]
   pub(crate) height_limit: Option<u64>,
 }
 
diff --git a/src/subcommand/find.rs b/src/subcommand/find.rs
index fee0c3c7cb..e94c937ca8 100644
--- a/src/subcommand/find.rs
+++ b/src/subcommand/find.rs
@@ -2,6 +2,7 @@ use super::*;
 
 #[derive(Debug, Parser)]
 pub(crate) struct Find {
+  #[clap(help = "Find output and offset of <ORDINAL>.")]
   ordinal: Ordinal,
 }
 
diff --git a/src/subcommand/list.rs b/src/subcommand/list.rs
index 73840abdac..b4a862f3fb 100644
--- a/src/subcommand/list.rs
+++ b/src/subcommand/list.rs
@@ -2,6 +2,7 @@ use super::*;
 
 #[derive(Debug, Parser)]
 pub(crate) struct List {
+  #[clap(help = "List ordinal ranges in <OUTPOINT>.")]
   outpoint: OutPoint,
 }
 
diff --git a/src/subcommand/parse.rs b/src/subcommand/parse.rs
index 201f445bf6..aa0325f2d0 100644
--- a/src/subcommand/parse.rs
+++ b/src/subcommand/parse.rs
@@ -2,6 +2,7 @@ use super::*;
 
 #[derive(Debug, Parser)]
 pub(crate) struct Parse {
+  #[clap(help = "Parse <ORDINAL>.")]
   ordinal: Ordinal,
 }
 
diff --git a/src/subcommand/range.rs b/src/subcommand/range.rs
index 07c3c75389..df575cfb4c 100644
--- a/src/subcommand/range.rs
+++ b/src/subcommand/range.rs
@@ -2,8 +2,9 @@ use super::*;
 
 #[derive(Debug, Parser)]
 pub(crate) struct Range {
-  #[clap(long)]
+  #[clap(long, help = "Display range as names.")]
   name: bool,
+  #[clap(help = "List ordinal range in subsidy at <HEIGHT>.")]
   height: Height,
 }
 
diff --git a/src/subcommand/traits.rs b/src/subcommand/traits.rs
index 01d4be8d89..5db47b4650 100644
--- a/src/subcommand/traits.rs
+++ b/src/subcommand/traits.rs
@@ -2,6 +2,7 @@ use super::*;
 
 #[derive(Debug, Parser)]
 pub(crate) struct Traits {
+  #[clap(help = "Show traits for <ORDINAL>.")]
   ordinal: Ordinal,
 }