-

Author: OskarStark

src/Chain/InputProcessor/SystemPromptInputProcessor.php

@@ -17,12 +17,8 @@
     public function __construct(
         private string $systemPrompt,
         private ?ToolBoxInterface $toolBox = null,
-        private bool $includeTools = false,
         private LoggerInterface $logger = new NullLogger(),
     ) {
-        if ($includeTools && null === $toolBox) {
-            throw new \InvalidArgumentException('Tool definitions cannot be included without a ToolBox.');
-        }
     }
 
     public function processInput(Input $input): void
@@ -37,7 +33,11 @@ public function processInput(Input $input): void
 
         $message = $this->systemPrompt;
 
-        if ($this->includeTools) {
+        if ($this->toolBox instanceof ToolBoxInterface
+            && [] !== $this->toolBox->getMap()
+        ) {
+            $this->logger->debug('Append tool definitions to system prompt.');
+
             $tools = implode(PHP_EOL.PHP_EOL, array_map(
                 fn (Metadata $tool) => <<<TOOL
                     ## {$tool->name}

tests/Chain/InputProcessor/SystemPromptInputProcessorTest.php

@@ -77,7 +77,6 @@ public function needsToolboxToBeAbleToIncludeToolDefinitions(): void
         new SystemPromptInputProcessor(
             'This is a system prompt',
             toolBox: null,
-            includeTools: true,
         );
     }
 
@@ -95,9 +94,9 @@ public function getMap(): array
                             ToolRequiredParams::class,
                             'tool_required_params',
                             <<<DESCRIPTION
-A tool with required parameters
-or not
-DESCRIPTION,
+                                A tool with required parameters
+                                or not
+                                DESCRIPTION,
                             'bar',
                             null
                         ),
@@ -108,8 +107,7 @@ public function execute(ToolCall $toolCall): mixed
                 {
                     return null;
                 }
-            },
-            includeTools: true,
+            }
         );
 
         $input = new Input(new GPT(), new MessageBag(Message::ofUser('This is a user message')), []);