diff --git a/simplemind/providers/_base.py b/simplemind/providers/_base.py
index 05b4b74..235e030 100644
--- a/simplemind/providers/_base.py
+++ b/simplemind/providers/_base.py
@@ -34,12 +34,18 @@ class BaseProvider(ABC):
         raise NotImplementedError
 
     @abstractmethod
-    def send_conversation(self, conversation: "Conversation") -> "Message":
+    def send_conversation(
+        self,
+        conversation: "Conversation",
+        tools: list[Callable] | None = None,
+    ) -> "Message":
         """Send a conversation to the provider."""
         raise NotImplementedError
 
     @abstractmethod
-    def structured_response(self, prompt: str, response_model: Type[T], **kwargs) -> T:
+    def structured_response(
+        self, prompt: str, response_model: Type[T], **kwargs
+    ) -> T:
         """Get a structured response."""
         raise NotImplementedError
 
@@ -64,3 +70,5 @@ class BaseProvider(ABC):
     def make_tools(self, tools: list[Callable] | None):
         if tools is not None:
             return [self.tool.from_function(func) for func in tools]
+        else:
+            return []
diff --git a/simplemind/providers/_base_tools.py b/simplemind/providers/_base_tools.py
index 6922754..7a2f37f 100644
--- a/simplemind/providers/_base_tools.py
+++ b/simplemind/providers/_base_tools.py
@@ -42,6 +42,12 @@ class BaseTool(BaseModel, ABC):
     properties: dict[str, BaseToolProperty]
     required: list[str] | None = None
     config: ClassVar[BaseToolConfig] = BaseToolConfig()
+    raw_func: Callable
+    tool_id: str | None = None
+    function_result: str | None = None
+
+    def is_executed(self) -> bool:
+        return self.function_result is not None
 
     @classmethod
     def convert_type(cls, field_type) -> str:
@@ -104,7 +110,14 @@ class BaseTool(BaseModel, ABC):
             description=(func.__doc__ or "").strip(),
             properties=properties,
             required=required,
+            raw_func=func,
         )
 
     @abstractmethod
-    def get_schema(self) -> Any: ...
+    def get_input_schema(self) -> Any: ...
+
+    @abstractmethod
+    def handle(self, message) -> None: ...
+
+    @abstractmethod
+    def get_response_schema(self) -> Any: ...