diff --git a/packages/toolbox-core/src/toolbox_core/tool.py b/packages/toolbox-core/src/toolbox_core/tool.py
index d26d9287..73ca0009 100644
--- a/packages/toolbox-core/src/toolbox_core/tool.py
+++ b/packages/toolbox-core/src/toolbox_core/tool.py
@@ -63,8 +63,8 @@ def __init__(
             name: The name of the remote tool.
             description: The description of the remote tool.
             params: The args of the tool.
-            required_authn_params: A dict of required authenticated parameters to a list
-                of services that provide values for them.
+            required_authn_params: A map of required authenticated parameters to a list
+                of alternative services that can provide values for them.
             auth_service_token_getters: A dict of authService -> token (or callables that
                 produce a token)
             bound_params: A mapping of parameter names to bind to specific values or
@@ -134,8 +134,8 @@ def __copy(
             name: The name of the remote tool.
             description: The description of the remote tool.
             params: The args of the tool.
-            required_authn_params: A dict of required authenticated parameters that need
-                an auth_service_token_getter set for them yet.
+            required_authn_params: A map of required authenticated parameters to a list
+                of alternative services that can provide values for them.
             auth_service_token_getters: A dict of authService -> token (or callables
                 that produce a token)
             bound_params: A mapping of parameter names to bind to specific values or