diff --git a/.readthedocs.yml b/.readthedocs.yml
index 57476c1e3..974326d6f 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-24.04
   tools:
-    python: "3.13"
+    python: "3.14"
   commands:
     - asdf plugin add uv
     - asdf install uv latest
diff --git a/docs/conf.py b/docs/conf.py
index 9419c4114..34a1f4c59 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -21,7 +21,6 @@
     "sphinx.ext.doctest",
     "sphinx.ext.extlinks",
     "sphinx.ext.intersphinx",
-    "sphinx_toolbox.more_autodoc.autotypeddict",
 ]
 
 # General information about the project.
diff --git a/docs/metadata.rst b/docs/metadata.rst
index 7acaa81f9..5fc2f6b4d 100644
--- a/docs/metadata.rst
+++ b/docs/metadata.rst
@@ -47,6 +47,7 @@ Low Level Interface
 
 .. autoclass:: packaging.metadata.RawMetadata
     :members:
+    :undoc-members:
 
 .. autofunction:: packaging.metadata.parse_email
 
diff --git a/pyproject.toml b/pyproject.toml
index 8a396d3aa..580d3ddd7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,6 @@ test = [
 ]
 docs = [
   "furo",
-  "sphinx-toolbox",
   "typing-extensions>=4.1.0; python_version < '3.9'",
 ]
 benchmark = [
@@ -62,7 +61,14 @@ dev = [
 
 [tool.flit.sdist]
 include = ["tests/", "docs/", "CHANGELOG.rst"]
-exclude = ["docs/_build", "tests/manylinux/build-hello-world.sh", "tests/musllinux/build.sh", "tests/hello-world.c", "tests/__pycache__", "build/__pycache__"]
+exclude = [
+  "docs/_build",
+  "tests/manylinux/build-hello-world.sh",
+  "tests/musllinux/build.sh",
+  "tests/hello-world.c",
+  "tests/__pycache__",
+  "build/__pycache__",
+]
 
 [tool.typos.default.extend-identifiers]
 iMatix = "iMatix"
@@ -82,7 +88,13 @@ source_pkgs = ["packaging"]
 [tool.coverage.report]
 show_missing = true
 fail_under = 100
-exclude_also = ["@(abc.)?abstractmethod", "@(abc.)?abstractproperty", "if (typing.)?TYPE_CHECKING:", "@(typing.)?overload", "def __dir__()"]
+exclude_also = [
+    "@(abc.)?abstractmethod",
+    "@(abc.)?abstractproperty",
+    "if (typing.)?TYPE_CHECKING:",
+    "@(typing.)?overload",
+    "def __dir__()",
+]
 
 [tool.pytest.ini_options]
 minversion = "6.2"
diff --git a/src/packaging/markers.py b/src/packaging/markers.py
index 7e178858a..e1007aea8 100644
--- a/src/packaging/markers.py
+++ b/src/packaging/markers.py
@@ -75,7 +75,7 @@ class UndefinedEnvironmentName(ValueError):
 class Environment(TypedDict):
     """
     A dictionary that represents a Python environment as captured by
-    :func:`default_environment`.
+    :func:`default_environment`. All fields are required.
     """
 
     implementation_name: str
diff --git a/src/packaging/metadata.py b/src/packaging/metadata.py
index 967a932f9..b3269a45e 100644
--- a/src/packaging/metadata.py
+++ b/src/packaging/metadata.py
@@ -67,8 +67,8 @@ class RawMetadata(TypedDict, total=False):
 
     Core metadata fields that can be specified multiple times are stored as a
     list or dict depending on which is appropriate for the field. Any fields
-    which hold multiple values in a single field are stored as a list.
-
+    which hold multiple values in a single field are stored as a list. All fields
+    are considered optional.
     """
 
     # Metadata 1.0 - PEP 241