diff --git a/esphome/arduino8266/toolchain.py b/esphome/arduino8266/toolchain.py
index de684387edb..c0170ca0ff4 100644
--- a/esphome/arduino8266/toolchain.py
+++ b/esphome/arduino8266/toolchain.py
@@ -27,10 +27,7 @@ _MAX_RAM_SIZE = 81920
 
 
 def _warn_ignored_platformio_options() -> None:
-    """Warn for component-added platformio options the native build drops.
-
-    The consumed set lives next to the routing in core/config.py so the
-    two cannot drift."""
+    """Warn for component-added platformio options the native build drops."""
     from esphome.core.config import NATIVE_ARDUINO_CONSUMED_PIO_OPTIONS
 
     consumed = NATIVE_ARDUINO_CONSUMED_PIO_OPTIONS
@@ -235,11 +232,8 @@ def _parse_app_size(build_dir: Path, paths: framework.InstalledPaths) -> int | N
 
 
 def _print_size_summary(build_dir: Path, paths: framework.InstalledPaths) -> bool:
-    """Print the PlatformIO-shaped RAM/Flash lines; False when skipped.
-
-    The exact shape (including the bar) is parsed by
-    ``script/ci_memory_impact_extract.py``; ``print_size_line`` matches it.
-    """
+    """Print the RAM/Flash lines ``ci_memory_impact_extract.py`` parses;
+    False when skipped."""
     from esphome.build_helpers.size_summary import print_size_line
 
     size_tool = _toolchain_tool("size")
@@ -293,11 +287,8 @@ _CCACHE_UNRESOLVED: Any = object()
 
 
 def get_idedata(ccache: str | None = _CCACHE_UNRESOLVED) -> dict | None:
-    """Derive idedata from the build's compile_commands.json.
-
-    Same contract as ``espidf.toolchain.get_idedata``: the fields IDE
-    integrations, clang-tidy, and the memory analyzer expect.
-    """
+    """Derive idedata from the build's compile_commands.json (same
+    contract as ``espidf.toolchain.get_idedata``)."""
     from esphome.build_helpers.idedata import load_or_build_idedata
 
     if ccache is _CCACHE_UNRESOLVED:
diff --git a/esphome/build_helpers/idedata.py b/esphome/build_helpers/idedata.py
index 930fe983a6f..769268e521e 100644
--- a/esphome/build_helpers/idedata.py
+++ b/esphome/build_helpers/idedata.py
@@ -36,11 +36,8 @@ IDEDATA_BEST_EFFORT_ERRORS = (
 
 
 def warn_if_idedata_missing(get_idedata: Callable[[], dict | None]) -> None:
-    """Run an idedata generator, downgrading any failure to a warning.
-
-    Shared by the native backends: the firmware already built, so a missing
-    or broken idedata must not fail a successful build.
-    """
+    """Run an idedata generator, downgrading any failure to a warning:
+    the firmware already built."""
     try:
         if get_idedata() is None:
             _LOGGER.warning("No idedata was generated for this build")
diff --git a/esphome/components/esp8266/__init__.py b/esphome/components/esp8266/__init__.py
index 31ff7e4b7f8..4e3a9052712 100644
--- a/esphome/components/esp8266/__init__.py
+++ b/esphome/components/esp8266/__init__.py
@@ -317,11 +317,7 @@ CONFIG_SCHEMA = cv.All(
 
 
 def native_toolchain_module():
-    """The native build backend for the resolved toolchain, if any.
-
-    ``__main__`` dispatches from its own toolchain-keyed table; this helper
-    serves the component's internal callers.
-    """
+    """The native build backend for the resolved toolchain, if any."""
     if not CORE.using_toolchain_arduino:
         return None
     from esphome.arduino8266 import toolchain
diff --git a/script/determine-jobs.py b/script/determine-jobs.py
index 9eb6496541a..c6dbd4cb16b 100755
--- a/script/determine-jobs.py
+++ b/script/determine-jobs.py
@@ -564,10 +564,8 @@ def _path_or_file_trigger(
 
 @cache
 def _cached_components_closure(files: tuple[str, ...]) -> frozenset[str]:
-    """Dependency closure of the changed components, from the changed files.
-
-    The walk is expensive and every toolchain smoke-test job asks for the
-    same file list, so compute it once per run."""
+    """Dependency closure of the changed components; cached because the
+    walk is expensive and every smoke-test job asks for the same list."""
     component_files = [f for f in files if filter_component_and_test_files(f)]
     return frozenset(get_components_with_dependencies(component_files, True))
 
@@ -723,12 +721,8 @@ def _esp8266_native_path_or_file_trigger(files: list[str]) -> bool:
 
 
 def esp8266_native_components_to_test(branch: str | None = None) -> list[str]:
-    """Subset of ``ESP8266_NATIVE_TEST_COMPONENTS`` the job needs to compile.
-
-    Same narrowing logic as ``esp32_platformio_components_to_test``: the full
-    list on core or infrastructure changes, otherwise the intersection with
-    the changed-component dependency closure (empty list skips the job).
-    """
+    """Subset of ``ESP8266_NATIVE_TEST_COMPONENTS`` the job needs to
+    compile (same narrowing as ``esp32_platformio_components_to_test``)."""
     return _toolchain_components_to_test(
         branch, ESP8266_NATIVE_TEST_COMPONENTS, _esp8266_native_path_or_file_trigger
     )