diff --git a/hive-ag3nt/src/mcp.rs b/hive-ag3nt/src/mcp.rs
index b8cee0b1..3a8f2bb0 100644
--- a/hive-ag3nt/src/mcp.rs
+++ b/hive-ag3nt/src/mcp.rs
@@ -1064,6 +1064,9 @@ impl AgentServer {
             capability). All filters are optional - omit to get the last N host journal lines. \
             `unit`: filter to a systemd unit (e.g. `hive-c0re.service`). \
             `container`: nspawn machine name verbatim (e.g. `h-iris`). Omit for host journal. \
+            Agent containers use the `h-` prefix (e.g. `h-iris`, `h-atlas`); \
+            infrastructure containers use their full name (e.g. `hive-ci`, `hive-forge`, \
+            `hive-matrix`, `hive-gateway`). \
             `lines`: how many lines (default 30, max 100). \
             `priority`: minimum syslog level enum. \
             `grep`: regex matched against log message fields (journalctl --grep). \
@@ -1705,6 +1708,9 @@ pub struct GetHostJournalArgs {
     #[serde(default)]
     pub unit: Option<String>,
     /// nspawn machine name verbatim (e.g. `h-iris`). Omit for host journal.
+    /// Agent containers use the `h-` prefix (e.g. `h-iris`); infrastructure
+    /// containers use their full name (e.g. `hive-ci`, `hive-forge`,
+    /// `hive-matrix`, `hive-gateway`).
     #[serde(default)]
     pub container: Option<String>,
     /// Number of lines to return (default 30, max 100).