Diagram

How to use

public class TestTool {
    private String lastResult;

    Optional<String> lastResult() {
        return Optional.ofNullable(lastResult);
    }

    @Tool("tool for test AI agent executor")
    String execTest(@P("test message") String message) {

        lastResult = format( "test tool executed: %s", message);
        return lastResult;
    }
}

public void main( String args[] ) throws Exception {

    var toolSpecification = ToolSpecification.builder()
            .name("getPCName")
            .description("Returns a String - PC name the AI is currently running in. Returns null if station is not running")
            .build();

    var toolExecutor = (toolExecutionRequest, memoryId) -> getPCName();

    var chatLanguageModel = OpenAiChatModel.builder()
            .apiKey( System.getenv( "OPENAI_API_KEY" ) )
            .modelName( "gpt-4o-mini" )
            .logResponses(true)
            .maxRetries(2)
            .temperature(0.0)
            .maxTokens(2000)
            .build();


    var agentExecutor = AgentExecutor.graphBuilder()
            .chatLanguageModel(chatLanguageModel)
            // add object with tool
            .toolSpecification(new TestTool())
            // add dynamic tool
            .toolExecutor(toolSpecification, toolExecutor)
            .build();

    var workflow = agentExecutor.compile();

    var state =  workflow.stream( Map.of( "messages", UserMessage.from("Run my test!") ) );

    System.out.println( state.lastMessage() );
}