diff --git a/bioimageio/spec/_internal/node.py b/bioimageio/spec/_internal/node.py
index c44cf0b47..921d75198 100644
--- a/bioimageio/spec/_internal/node.py
+++ b/bioimageio/spec/_internal/node.py
@@ -17,12 +17,12 @@
 from .validation_context import ValidationContext, validation_context_var
 
 
-def _node_title_generator(model: Type[Node]) -> str:
+def _node_title_generator(node: Type[Node]) -> str:
     return (
-        f"{model.implemented_type} {model.implemented_format_version}"  # pyright: ignore[reportAttributeAccessIssue]
-        if hasattr(model, "implemented_type")
-        and hasattr(model, "implemented_format_version")
-        else model.__name__
+        f"{node.implemented_type} {node.implemented_format_version}"  # pyright: ignore[reportAttributeAccessIssue]
+        if hasattr(node, "implemented_type")
+        and hasattr(node, "implemented_format_version")
+        else f"{node.__module__.replace('bioimageio.spec.', '')}.{node.__name__}"
     )
 
 
@@ -38,7 +38,7 @@ class Node(
     use_attribute_docstrings=True,
     model_title_generator=_node_title_generator,
 ):
-    """Subpart of a resource description"""
+    """"""  # empty docstring to remove all pydantic docstrings from the pdoc spec docs
 
     @classmethod
     def model_validate(
diff --git a/bioimageio/spec/model/v0_5.py b/bioimageio/spec/model/v0_5.py
index d00b2ee7b..98e811c9f 100644
--- a/bioimageio/spec/model/v0_5.py
+++ b/bioimageio/spec/model/v0_5.py
@@ -130,7 +130,6 @@
 from .v0_4 import ZeroMeanUnitVarianceDescr as _ZeroMeanUnitVarianceDescr_v0_4
 from .v0_4 import package_weights
 
-# unit names from https://ngff.openmicroscopy.org/latest/#axes-md
 SpaceUnit = Literal[
     "attometer",
     "angstrom",
@@ -159,6 +158,7 @@
     "zeptometer",
     "zettameter",
 ]
+"""Space unit compatible to the [OME-Zarr axes specification 0.5](https://ngff.openmicroscopy.org/0.5/#axes-md)"""
 
 TimeUnit = Literal[
     "attosecond",
@@ -185,6 +185,7 @@
     "zeptosecond",
     "zettasecond",
 ]
+"""Time unit compatible to the [OME-Zarr axes specification 0.5](https://ngff.openmicroscopy.org/0.5/#axes-md)"""
 
 AxisType = Literal["batch", "channel", "index", "time", "space"]
 
@@ -414,8 +415,6 @@ def _get_unit(
         return axis.unit
 
 
-# this Axis definition is compatible with the NGFF draft from July 10, 2023
-# https://ngff.openmicroscopy.org/latest/#axes-md
 class AxisBase(NodeWithExplicitlySetFields):
     fields_to_set_explicitly: ClassVar[FrozenSet[LiteralString]] = frozenset({"type"})