fix(agent): allow agents to run without requiring any tools (#8533)

fix

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

src/backend/base/langflow/base/agents/agent.py

@@ -124,15 +124,13 @@ class LCAgentComponent(Component):
         if isinstance(agent, AgentExecutor):
             runnable = agent
         else:
-            if not hasattr(self, "tools") or not self.tools:
-                msg = "Tools are required to run the agent."
-                raise ValueError(msg)
+            # note the tools are not required to run the agent, hence the validation removed.
             handle_parsing_errors = hasattr(self, "handle_parsing_errors") and self.handle_parsing_errors
             verbose = hasattr(self, "verbose") and self.verbose
             max_iterations = hasattr(self, "max_iterations") and self.max_iterations
             runnable = AgentExecutor.from_agent_and_tools(
                 agent=agent,
-                tools=self.tools,
+                tools=self.tools or [],
                 handle_parsing_errors=handle_parsing_errors,
                 verbose=verbose,
                 max_iterations=max_iterations,

src/backend/base/langflow/components/agents/agent.py

@@ -87,16 +87,12 @@ class AgentComponent(ToolCallingAgentComponent):
                     msg = "CurrentDateComponent must be converted to a StructuredTool"
                     raise TypeError(msg)
                 self.tools.append(current_date_tool)
-
-            # Validate tools
-            if not self.tools:
-                msg = "Tools are required to run the agent. Please add at least one tool."
-                raise ValueError(msg)
+            # note the tools are not required to run the agent, hence the validation removed.
 
             # Set up and run agent
             self.set(
                 llm=llm_model,
-                tools=self.tools,
+                tools=self.tools or [],
                 chat_history=self.chat_history,
                 input_value=self.input_value,
                 system_prompt=self.system_prompt,