diff --git a/castor/acs/castor-tape-acs-dismount.man b/castor/acs/castor-tape-acs-dismount.man
index 1fb83722bdc7c455b9a389c96da4b2b174923260..11478a67ea3d8262d089ef3c0b02f15a97f94ea0 100644
--- a/castor/acs/castor-tape-acs-dismount.man
+++ b/castor/acs/castor-tape-acs-dismount.man
@@ -23,6 +23,10 @@ The format of \fBDRIVE_SLOT\fP is as follows:
 
 .B ACS:LSM:panel:transport
 
+Please note that this command-line tool communicates directly with the CSI of 
+the ACS system. This command-line tool does not communicate with any CASTOR
+daemons.
+
 .SH OPTIONS
 .TP
 \fB\-d, \-\-debug
diff --git a/castor/acs/castor-tape-acs-mount.man b/castor/acs/castor-tape-acs-mount.man
index db6217b146af7ce70995844ae81fda847b7433be..a320919ad2b9c7164ee90602f8d26301fd009dff 100644
--- a/castor/acs/castor-tape-acs-mount.man
+++ b/castor/acs/castor-tape-acs-mount.man
@@ -23,6 +23,10 @@ The format of \fBDRIVE_SLOT\fP is as follows:
 
 .B ACS:LSM:panel:transport
 
+Please note that this command-line tool communicates directly with the CSI of
+the ACS system. This command-line tool does not communicate with any CASTOR
+daemons.
+
 .SH OPTIONS
 .TP
 \fB\-d, \-\-debug
diff --git a/castor/acs/castor-tape-acs-queryvolume.man b/castor/acs/castor-tape-acs-queryvolume.man
index 3f1782378ae09bdb76025f0a7d6625b51de6c799..810169abb69fd4718804693c4a3a0859e3e68e77 100644
--- a/castor/acs/castor-tape-acs-queryvolume.man
+++ b/castor/acs/castor-tape-acs-queryvolume.man
@@ -20,6 +20,10 @@ castor-tape-acs-queryvolume \- queries a volume
 \fBcastor-tape-acs-queryvolume\fP quieries ACS for information about the volume
 with the specfied \fBVID\fP.
 
+Please note that this command-line tool communicates directly with the CSI of 
+the ACS system. This command-line tool does not communicate with any CASTOR
+daemons.
+
 .SH OPTIONS
 .TP
 \fB\-d, \-\-debug