fix: no error when the tool name is invalid in agent state (#1997)

letta/server/server.py

@@ -372,11 +372,12 @@ def _load_agent(self, agent_id: str, actor: User, interface: Union[AgentInterfac
             logger.debug(f"Creating an agent object")
             tool_objs = []
             for name in agent_state.tools:
-                tool_obj = self.tool_manager.get_tool_by_name(tool_name=name, actor=actor)
-                if not tool_obj:
-                    logger.exception(f"Tool {name} does not exist for user {user_id}")
-                    raise ValueError(f"Tool {name} does not exist for user {user_id}")
-                tool_objs.append(tool_obj)
+                # TODO: This should be a hard failure, but for migration reasons, we patch it for now
+                try:
+                    tool_obj = self.tool_manager.get_tool_by_name(tool_name=name, actor=actor)
+                    tool_objs.append(tool_obj)
+                except NoResultFound:
+                    warnings.warn(f"Tried to retrieve a tool with name {name} from the agent_state, but does not exist in tool db.")
 
             # Make sure the memory is a memory object
             assert isinstance(agent_state.memory, Memory)