feat: Hints for tools and agent

packages/frontend/editor-ui/src/utils/nodeViewUtils.test.ts

@@ -1,7 +1,7 @@
 import { generateOffsets, getGenericHints, getNewNodePosition } from './nodeViewUtils';
 import type { INode, INodeTypeDescription, INodeExecutionData, Workflow } from 'n8n-workflow';
 import type { INodeUi, XYPosition } from '@/Interface';
-import { NodeHelpers } from 'n8n-workflow';
+import { NodeHelpers, SEND_AND_WAIT_OPERATION } from 'n8n-workflow';
 
 import { describe, it, expect, beforeEach } from 'vitest';
 import { mock, type MockProxy } from 'vitest-mock-extended';
@@ -19,7 +19,7 @@ describe('getGenericHints', () => {
 
 	beforeEach(() => {
 		mockWorkflowNode = mock<INode>();
-		mockNode = mock<INodeUi>();
+		mockNode = mock<INodeUi>({ type: 'test' });
 		mockNodeType = mock<INodeTypeDescription>();
 		mockNodeOutputData = [];
 		mockWorkflow = mock<Workflow>();
@@ -138,6 +138,54 @@ describe('getGenericHints', () => {
 			},
 		]);
 	});
+
+	it('should return an hint for tool nodes without AI expressions', () => {
+		mockNode.type = 'custom-tool-node';
+		hasNodeRun = true;
+		mockWorkflowNode.parameters = { param1: 'staticValue' };
+
+		const hints = getGenericHints({
+			workflowNode: mockWorkflowNode,
+			node: mockNode,
+			nodeType: mockNodeType,
+			nodeOutputData: mockNodeOutputData,
+			hasMultipleInputItems,
+			workflow: mockWorkflow,
+			hasNodeRun,
+		});
+
+		expect(hints).toEqual([
+			{
+				message:
+					'No parameters are set up to be filled by AI. Click on the ✨ button next to a parameter to allow AI to set its value.',
+				location: 'outputPane',
+				whenToDisplay: 'afterExecution',
+			},
+		]);
+	});
+
+	it('should return a hint for sendAndWait operation with multiple input items', () => {
+		hasMultipleInputItems = true;
+		mockWorkflowNode.parameters.operation = SEND_AND_WAIT_OPERATION;
+		mockWorkflow.getNode.mockReturnValue({ executeOnce: false } as unknown as INode);
+
+		const hints = getGenericHints({
+			workflowNode: mockWorkflowNode,
+			node: mockNode,
+			nodeType: mockNodeType,
+			nodeOutputData: mockNodeOutputData,
+			hasMultipleInputItems,
+			workflow: mockWorkflow,
+			hasNodeRun,
+		});
+
+		expect(hints).toEqual([
+			{
+				message: 'This action will run only once, for the first input item',
+				location: 'outputPane',
+			},
+		]);
+	});
 });
 
 describe('generateOffsets', () => {

packages/frontend/editor-ui/src/utils/nodeViewUtils.ts

@@ -15,7 +15,7 @@ import type {
 	NodeHint,
 	Workflow,
 } from 'n8n-workflow';
-import { NodeHelpers } from 'n8n-workflow';
+import { NodeHelpers, SEND_AND_WAIT_OPERATION } from 'n8n-workflow';
 import type { RouteLocation } from 'vue-router';
 
 /*
@@ -280,6 +280,19 @@ export function getGenericHints({
 }) {
 	const nodeHints: NodeHint[] = [];
 
+	// tools hints
+	if (node?.type.toLocaleLowerCase().includes('tool') && hasNodeRun) {
+		const stringifiedParameters = JSON.stringify(workflowNode.parameters);
+		if (!stringifiedParameters.includes('$fromAI')) {
+			nodeHints.push({
+				message:
+					'No parameters are set up to be filled by AI. Click on the ✨ button next to a parameter to allow AI to set its value.',
+				location: 'outputPane',
+				whenToDisplay: 'afterExecution',
+			});
+		}
+	}
+
 	// add limit reached hint
 	if (hasNodeRun && workflowNode.parameters.limit) {
 		if (nodeOutputData.length === workflowNode.parameters.limit) {
@@ -306,6 +319,17 @@ export function getGenericHints({
 		}
 	}
 
+	// add sendAndWait hint
+	if (hasMultipleInputItems && workflowNode.parameters.operation === SEND_AND_WAIT_OPERATION) {
+		const executeOnce = workflow.getNode(node.name)?.executeOnce;
+		if (!executeOnce) {
+			nodeHints.push({
+				message: 'This action will run only once, for the first input item',
+				location: 'outputPane',
+			});
+		}
+	}
+
 	// add expression in field name hint for Set node
 	if (node.type === SET_NODE_TYPE && node.parameters.mode === 'manual') {
 		const rawParameters = NodeHelpers.getNodeParameters(