diff --git a/homeassistant/helpers/llm.py b/homeassistant/helpers/llm.py
index e37aa0c532d677..0c173df81ff65e 100644
--- a/homeassistant/helpers/llm.py
+++ b/homeassistant/helpers/llm.py
@@ -177,6 +177,11 @@ async def async_call_tool(self, tool_input: ToolInput) -> JsonObjectType:
         else:
             raise HomeAssistantError(f'Tool "{tool_input.tool_name}" not found')
 
+        tool_input = ToolInput(
+            tool_name=tool_input.tool_name,
+            tool_args=tool.parameters(tool_input.tool_args),
+        )
+
         return await tool.async_call(self.api.hass, tool_input, self.llm_context)
 
 
diff --git a/tests/components/google_generative_ai_conversation/test_conversation.py b/tests/components/google_generative_ai_conversation/test_conversation.py
index 1ea5c2ad9b8d29..4192a60513e69d 100644
--- a/tests/components/google_generative_ai_conversation/test_conversation.py
+++ b/tests/components/google_generative_ai_conversation/test_conversation.py
@@ -212,7 +212,7 @@ async def test_function_call(
             name="test_tool",
             args={
                 "param1": ["test_value", "param1\\'s value"],
-                "param2": "param2\\'s value",
+                "param2": 2.7,
             },
         )
 
@@ -258,7 +258,7 @@ def tool_call(
             tool_name="test_tool",
             tool_args={
                 "param1": ["test_value", "param1's value"],
-                "param2": "param2's value",
+                "param2": 2.7,
             },
         ),
         llm.LLMContext(
diff --git a/tests/components/ollama/test_conversation.py b/tests/components/ollama/test_conversation.py
index 6c34b8e005288a..66dc8a0c6038d9 100644
--- a/tests/components/ollama/test_conversation.py
+++ b/tests/components/ollama/test_conversation.py
@@ -121,7 +121,7 @@ async def test_template_variables(
     ("tool_args", "expected_tool_args"),
     [
         ({"param1": "test_value"}, {"param1": "test_value"}),
-        ({"param1": 2}, {"param1": 2}),
+        ({"param2": 2}, {"param2": 2}),
         (
             {"param1": "test_value", "floor": ""},
             {"param1": "test_value"},  # Omit empty arguments
@@ -153,7 +153,8 @@ async def test_function_call(
     mock_tool.name = "test_tool"
     mock_tool.description = "Test function"
     mock_tool.parameters = vol.Schema(
-        {vol.Optional("param1", description="Test parameters"): str}
+        {vol.Optional("param1", description="Test parameters"): str},
+        extra=vol.ALLOW_EXTRA,
     )
     mock_tool.async_call.return_value = "Test response"