diff --git a/tools/requirements/requirements.ci.txt b/tools/requirements/requirements.ci.txt
index 0e5c231133..fa1ac259d4 100644
--- a/tools/requirements/requirements.ci.txt
+++ b/tools/requirements/requirements.ci.txt
@@ -1,5 +1,9 @@
 # Python package requirements for CI in ESP-IDF.
 # This feature can be enabled by running "install.{sh,bat,ps1,fish} --enable-ci"
+#
+# This file lists Python packages without version specifiers. Version details
+# are stored in a separate constraints file. For more information, visit:
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/tools/idf-tools.html
 
 # ci
 coverage
diff --git a/tools/requirements/requirements.core.txt b/tools/requirements/requirements.core.txt
index 9e5d4660bb..9e12cd16e2 100644
--- a/tools/requirements/requirements.core.txt
+++ b/tools/requirements/requirements.core.txt
@@ -1,4 +1,8 @@
 # Python package requirements for ESP-IDF. These are the so called core features which are installed in all systems.
+#
+# This file lists Python packages without version specifiers. Version details
+# are stored in a separate constraints file. For more information, visit:
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/tools/idf-tools.html
 
 setuptools
 packaging
diff --git a/tools/requirements/requirements.docs.txt b/tools/requirements/requirements.docs.txt
index b790f25345..f267396680 100644
--- a/tools/requirements/requirements.docs.txt
+++ b/tools/requirements/requirements.docs.txt
@@ -1,5 +1,9 @@
 # Python package requirements for building the documentation of ESP-IDF.
 # This feature can be enabled by running "install.{sh,bat,ps1,fish} --enable-docs"
+#
+# This file lists Python packages without version specifiers. Version details
+# are stored in a separate constraints file. For more information, visit:
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/tools/idf-tools.html
 
 esp-docs
 linuxdoc
diff --git a/tools/requirements/requirements.gdbgui.txt b/tools/requirements/requirements.gdbgui.txt
index a00523d1e4..2d7f1cd434 100644
--- a/tools/requirements/requirements.gdbgui.txt
+++ b/tools/requirements/requirements.gdbgui.txt
@@ -1,5 +1,9 @@
 # Python package requirements for gdbgui support ESP-IDF.
 # This feature can be enabled by running "install.{sh,bat,ps1,fish} --enable-gdbgui"
+#
+# This file lists Python packages without version specifiers. Version details
+# are stored in a separate constraints file. For more information, visit:
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/tools/idf-tools.html
 
 # gdbgui Python 3.11 issue https://github.com/cs01/gdbgui/issues/447 was fixed in 0.15.2.0. Windows users need an
 # older Python to use since new gdbgui versions don't support Windows anymore.
diff --git a/tools/requirements/requirements.pytest.txt b/tools/requirements/requirements.pytest.txt
index d94ee14ddb..68a5acb766 100644
--- a/tools/requirements/requirements.pytest.txt
+++ b/tools/requirements/requirements.pytest.txt
@@ -1,5 +1,9 @@
 # Python package requirements for pytest in ESP-IDF.
 # This feature can be enabled by running "install.{sh,bat,ps1,fish} --enable-pytest"
+#
+# This file lists Python packages without version specifiers. Version details
+# are stored in a separate constraints file. For more information, visit:
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/tools/idf-tools.html
 
 pytest-embedded-serial-esp
 pytest-embedded-idf