diff --git a/ctapipe/tools/train_disp_reconstructor.py b/ctapipe/tools/train_disp_reconstructor.py
index 5953bda8038..784d68a6a18 100644
--- a/ctapipe/tools/train_disp_reconstructor.py
+++ b/ctapipe/tools/train_disp_reconstructor.py
@@ -1,3 +1,6 @@
+"""
+Tool for training the DispReconstructor
+"""
 import astropy.units as u
 import numpy as np
 
@@ -8,6 +11,10 @@
 from ctapipe.reco import CrossValidator, DispReconstructor
 from ctapipe.reco.preprocessing import check_valid_rows, horizontal_to_telescope
 
+__all__ = [
+    "TrainDispReconstructor",
+]
+
 
 class TrainDispReconstructor(Tool):
     """
@@ -15,7 +22,8 @@ class TrainDispReconstructor(Tool):
 
     The tool first performs a cross validation to give an initial estimate
     on the quality of the estimation and then finally trains two models
-    (|disp| and sign(disp)) per telescope type on the full dataset.
+    (estimating ``norm(disp)`` and ``sign(disp)`` respectively) per
+    telescope type on the full dataset.
     """
 
     name = "ctapipe-train-disp-reconstructor"
@@ -54,9 +62,9 @@ class TrainDispReconstructor(Tool):
     project_disp = Bool(
         default_value=False,
         help=(
-            "If true, true |disp| is the distance between shower cog and"
+            "If true, ``true_disp`` is the distance between shower cog and"
             " the true source position along the reconstructed main shower axis."
-            "If false, true |disp| is the distance between shower cog"
+            "If false, ``true_disp`` is the distance between shower cog"
             " and the true source position."
         ),
     ).tag(config=True)
diff --git a/docs/api-reference/tools/index.rst b/docs/api-reference/tools/index.rst
index 0d1c2dc8e6d..e9e9823e253 100644
--- a/docs/api-reference/tools/index.rst
+++ b/docs/api-reference/tools/index.rst
@@ -93,5 +93,8 @@ Reference/API
 .. automodapi:: ctapipe.tools.train_particle_classifier
     :no-inheritance-diagram:
 
+.. automodapi:: ctapipe.tools.train_disp_reconstructor
+   :no-inheritance-diagram:
+
 .. automodapi:: ctapipe.tools.apply_models
     :no-inheritance-diagram:
diff --git a/docs/changes/2420.bugfix.rst b/docs/changes/2420.bugfix.rst
new file mode 100644
index 00000000000..aa21eafa4fb
--- /dev/null
+++ b/docs/changes/2420.bugfix.rst
@@ -0,0 +1 @@
+Add docstring for ``ctapipe-train-disp-reconstructor``.