diff --git a/homeassistant/helpers/intent.py b/homeassistant/helpers/intent.py
index 8f5ace63be8..6f9c221b1ca 100644
--- a/homeassistant/helpers/intent.py
+++ b/homeassistant/helpers/intent.py
@@ -243,6 +243,19 @@ class MatchTargetsConstraints:
     allow_duplicate_names: bool = False
     """True if entities with duplicate names are allowed in result."""
 
+    @property
+    def has_constraints(self) -> bool:
+        """Returns True if at least one constraint is set (ignores assistant)."""
+        return bool(
+            self.name
+            or self.area_name
+            or self.floor_name
+            or self.domains
+            or self.device_classes
+            or self.features
+            or self.states
+        )
+
 
 @dataclass
 class MatchTargetsPreferences:
@@ -766,6 +779,15 @@ class IntentHandler:
         return f"<{self.__class__.__name__} - {self.intent_type}>"
 
 
+def non_empty_string(value: Any) -> str:
+    """Coerce value to string and fail if string is empty or whitespace."""
+    value_str = cv.string(value)
+    if not value_str.strip():
+        raise vol.Invalid("string value is empty")
+
+    return value_str
+
+
 class DynamicServiceIntentHandler(IntentHandler):
     """Service Intent handler registration (dynamic).
 
@@ -817,7 +839,7 @@ class DynamicServiceIntentHandler(IntentHandler):
     def slot_schema(self) -> dict:
         """Return a slot schema."""
         slot_schema = {
-            vol.Any("name", "area", "floor"): cv.string,
+            vol.Any("name", "area", "floor"): non_empty_string,
             vol.Optional("domain"): vol.All(cv.ensure_list, [cv.string]),
             vol.Optional("device_class"): vol.All(cv.ensure_list, [cv.string]),
             vol.Optional("preferred_area_id"): cv.string,
@@ -892,6 +914,10 @@ class DynamicServiceIntentHandler(IntentHandler):
             features=self.required_features,
             states=self.required_states,
         )
+        if not match_constraints.has_constraints:
+            # Fail if attempting to target all devices in the house
+            raise IntentHandleError("Service handler cannot target all devices")
+
         match_preferences = MatchTargetsPreferences(
             area_id=slots.get("preferred_area_id", {}).get("value"),
             floor_id=slots.get("preferred_floor_id", {}).get("value"),
diff --git a/tests/components/intent/test_init.py b/tests/components/intent/test_init.py
index 586ea7dd8a2..95d1ee78538 100644
--- a/tests/components/intent/test_init.py
+++ b/tests/components/intent/test_init.py
@@ -236,7 +236,12 @@ async def test_turn_on_all(hass: HomeAssistant) -> None:
     hass.states.async_set("light.test_light_2", "off")
     calls = async_mock_service(hass, "light", SERVICE_TURN_ON)
 
-    await intent.async_handle(hass, "test", "HassTurnOn", {"name": {"value": "all"}})
+    await intent.async_handle(
+        hass,
+        "test",
+        "HassTurnOn",
+        {"name": {"value": "all"}, "domain": {"value": "light"}},
+    )
     await hass.async_block_till_done()
 
     # All lights should be on now
diff --git a/tests/helpers/test_intent.py b/tests/helpers/test_intent.py
index f9efd52d727..9f62e76ebc0 100644
--- a/tests/helpers/test_intent.py
+++ b/tests/helpers/test_intent.py
@@ -771,3 +771,45 @@ async def test_service_intent_handler_required_domains(hass: HomeAssistant) -> N
             "TestType",
             slots={"name": {"value": "bedroom"}, "domain": {"value": "switch"}},
         )
+
+
+async def test_service_handler_empty_strings(hass: HomeAssistant) -> None:
+    """Test that passing empty strings for filters fails in ServiceIntentHandler."""
+    handler = intent.ServiceIntentHandler(
+        "TestType", "light", "turn_on", "Turned {} on"
+    )
+    intent.async_register(hass, handler)
+
+    for slot_name in ("name", "area", "floor"):
+        # Empty string
+        with pytest.raises(intent.InvalidSlotInfo):
+            await intent.async_handle(
+                hass,
+                "test",
+                "TestType",
+                slots={slot_name: {"value": ""}},
+            )
+
+        # Whitespace
+        with pytest.raises(intent.InvalidSlotInfo):
+            await intent.async_handle(
+                hass,
+                "test",
+                "TestType",
+                slots={slot_name: {"value": "  "}},
+            )
+
+
+async def test_service_handler_no_filter(hass: HomeAssistant) -> None:
+    """Test that targeting all devices in the house fails."""
+    handler = intent.ServiceIntentHandler(
+        "TestType", "light", "turn_on", "Turned {} on"
+    )
+    intent.async_register(hass, handler)
+
+    with pytest.raises(intent.IntentHandleError):
+        await intent.async_handle(
+            hass,
+            "test",
+            "TestType",
+        )