diff --git a/homeassistant/helpers/llm.py b/homeassistant/helpers/llm.py
index 1ffc2880547..08125acc0da 100644
--- a/homeassistant/helpers/llm.py
+++ b/homeassistant/helpers/llm.py
@@ -199,7 +199,10 @@ class AssistAPI(API):
 
     async def async_get_api_prompt(self, tool_input: ToolInput) -> str:
         """Return the prompt for the API."""
-        prompt = "Call the intent tools to control Home Assistant. Just pass the name to the intent."
+        prompt = (
+            "Call the intent tools to control Home Assistant. "
+            "Just pass the name to the intent."
+        )
         if tool_input.device_id:
             device_reg = device_registry.async_get(self.hass)
             device = device_reg.async_get(tool_input.device_id)
diff --git a/tests/helpers/test_llm.py b/tests/helpers/test_llm.py
index 70c28545483..e3308b89061 100644
--- a/tests/helpers/test_llm.py
+++ b/tests/helpers/test_llm.py
@@ -174,9 +174,9 @@ async def test_assist_api_prompt(
     )
     api = llm.async_get_api(hass, "assist")
     prompt = await api.async_get_api_prompt(tool_input)
-    assert (
-        prompt
-        == "Call the intent tools to control Home Assistant. Just pass the name to the intent."
+    assert prompt == (
+        "Call the intent tools to control Home Assistant."
+        " Just pass the name to the intent."
     )
 
     entry = MockConfigEntry(title=None)
@@ -190,18 +190,18 @@ async def test_assist_api_prompt(
         suggested_area="Test Area",
     ).id
     prompt = await api.async_get_api_prompt(tool_input)
-    assert (
-        prompt
-        == "Call the intent tools to control Home Assistant. Just pass the name to the intent. You are in Test Area."
+    assert prompt == (
+        "Call the intent tools to control Home Assistant."
+        " Just pass the name to the intent. You are in Test Area."
     )
 
     floor = floor_registry.async_create("second floor")
     area = area_registry.async_get_area_by_name("Test Area")
     area_registry.async_update(area.id, floor_id=floor.floor_id)
     prompt = await api.async_get_api_prompt(tool_input)
-    assert (
-        prompt
-        == "Call the intent tools to control Home Assistant. Just pass the name to the intent. You are in Test Area (second floor)."
+    assert prompt == (
+        "Call the intent tools to control Home Assistant."
+        " Just pass the name to the intent. You are in Test Area (second floor)."
     )
 
     context.user_id = "12345"
@@ -210,7 +210,8 @@ async def test_assist_api_prompt(
     mock_user.name = "Test User"
     with patch("homeassistant.auth.AuthManager.async_get_user", return_value=mock_user):
         prompt = await api.async_get_api_prompt(tool_input)
-    assert (
-        prompt
-        == "Call the intent tools to control Home Assistant. Just pass the name to the intent. You are in Test Area (second floor). The user name is Test User."
+    assert prompt == (
+        "Call the intent tools to control Home Assistant."
+        " Just pass the name to the intent. You are in Test Area (second floor)."
+        " The user name is Test User."
     )