fix: Validate custom tool names for forbidden chars (#8878)

cypress/e2e/5-ndv.cy.ts

@@ -1,6 +1,6 @@
 import { v4 as uuid } from 'uuid';
 import { getVisibleSelect } from '../utils';
-import { MANUAL_TRIGGER_NODE_DISPLAY_NAME, AI_LANGUAGE_MODEL_OPENAI_CHAT_MODEL_NODE_NAME } from '../constants';
+import { MANUAL_TRIGGER_NODE_DISPLAY_NAME } from '../constants';
 import { NDV, WorkflowPage } from '../pages';
 import { NodeCreator } from '../pages/features/node-creator';
 
@@ -485,13 +485,13 @@ describe('NDV', () => {
 			const connectionGroups = [
 				{
 					title: 'Language Models',
-					id: 'ai_languageModel'
+					id: 'ai_languageModel',
 				},
 				{
 					title: 'Tools',
-					id: 'ai_tool'
+					id: 'ai_tool',
 				},
-			]
+			];
 
 			workflowPage.actions.addInitialNodeToCanvas('AI Agent', { keepNdvOpen: true });
 
@@ -513,13 +513,16 @@ describe('NDV', () => {
 					cy.getByTestId(`add-subnode-${group.id}`).click();
 					nodeCreator.getters.getNthCreatorItem(1).click();
 					getFloatingNodeByPosition('outputSub').click({ force: true });
-					cy.getByTestId('subnode-connection-group-ai_tool').findChildByTestId('floating-subnode').should('have.length', 2);
+					cy.getByTestId('subnode-connection-group-ai_tool')
+						.findChildByTestId('floating-subnode')
+						.should('have.length', 2);
 				}
 			});
 
 			// Since language model has no credentials set, it should show an error
-			cy.get('[class*=hasIssues]').should('have.length', 1);
-		})
+			// Sinse code tool require alphanumeric tool name it would also show an error(2 errors, 1 for each tool node)
+			cy.get('[class*=hasIssues]').should('have.length', 3);
+		});
 	});
 
 	it('should show node name and version in settings', () => {
@@ -636,14 +639,17 @@ describe('NDV', () => {
 	it('Should open appropriate node creator after clicking on connection hint link', () => {
 		const nodeCreator = new NodeCreator();
 		const hintMapper = {
-			'Memory': 'AI Nodes',
+			Memory: 'AI Nodes',
 			'Output Parser': 'AI Nodes',
 			'Token Splitter': 'Document Loaders',
-			'Tool': 'AI Nodes',
-			'Embeddings': 'Vector Stores',
-			'Vector Store': 'Retrievers'
-		}
-		cy.createFixtureWorkflow('open_node_creator_for_connection.json', `open_node_creator_for_connection ${uuid()}`);
+			Tool: 'AI Nodes',
+			Embeddings: 'Vector Stores',
+			'Vector Store': 'Retrievers',
+		};
+		cy.createFixtureWorkflow(
+			'open_node_creator_for_connection.json',
+			`open_node_creator_for_connection ${uuid()}`,
+		);
 
 		Object.entries(hintMapper).forEach(([node, group]) => {
 			workflowPage.actions.openNode(node);
@@ -651,5 +657,5 @@ describe('NDV', () => {
 			nodeCreator.getters.activeSubcategory().should('contain', group);
 			cy.realPress('Escape');
 		});
-	})
+	});
 });

packages/@n8n/nodes-langchain/nodes/tools/ToolCode/ToolCode.node.ts

@@ -21,7 +21,7 @@ export class ToolCode implements INodeType {
 		name: 'toolCode',
 		icon: 'fa:code',
 		group: ['transform'],
-		version: 1,
+		version: [1, 1.1],
 		description: 'Write a tool in JS or Python',
 		defaults: {
 			name: 'Custom Code Tool',
@@ -59,6 +59,26 @@ export class ToolCode implements INodeType {
 				type: 'string',
 				default: '',
 				placeholder: 'My_Tool',
+				displayOptions: {
+					show: {
+						'@version': [1],
+					},
+				},
+			},
+			{
+				displayName: 'Name',
+				name: 'name',
+				type: 'string',
+				default: '',
+				placeholder: 'e.g. My_Tool',
+				validateType: 'string-alphanumeric',
+				description:
+					'The name of the function to be called, could contain letters, numbers, and underscores only',
+				displayOptions: {
+					show: {
+						'@version': [{ _cnd: { gte: 1.1 } }],
+					},
+				},
 			},
 			{
 				displayName: 'Description',

packages/@n8n/nodes-langchain/nodes/tools/ToolWorkflow/ToolWorkflow.node.ts

@@ -24,7 +24,7 @@ export class ToolWorkflow implements INodeType {
 		name: 'toolWorkflow',
 		icon: 'fa:network-wired',
 		group: ['transform'],
-		version: 1,
+		version: [1, 1.1],
 		description: 'Uses another n8n workflow as a tool. Allows packaging any n8n node(s) as a tool.',
 		defaults: {
 			name: 'Custom n8n Workflow Tool',
@@ -62,6 +62,26 @@ export class ToolWorkflow implements INodeType {
 				type: 'string',
 				default: '',
 				placeholder: 'My_Color_Tool',
+				displayOptions: {
+					show: {
+						'@version': [1],
+					},
+				},
+			},
+			{
+				displayName: 'Name',
+				name: 'name',
+				type: 'string',
+				default: '',
+				placeholder: 'e.g. My_Color_Tool',
+				validateType: 'string-alphanumeric',
+				description:
+					'The name of the function to be called, could contain letters, numbers, and underscores only',
+				displayOptions: {
+					show: {
+						'@version': [{ _cnd: { gte: 1.1 } }],
+					},
+				},
 			},
 			{
 				displayName: 'Description',

packages/workflow/src/Interfaces.ts

@@ -2341,6 +2341,7 @@ export interface ResourceMapperField {
 
 export type FieldType =
 	| 'string'
+	| 'string-alphanumeric'
 	| 'number'
 	| 'dateTime'
 	| 'boolean'

packages/workflow/src/TypeValidation.ts

@@ -26,7 +26,14 @@ export const tryToParseString = (value: unknown): string => {
 
 	return String(value);
 };
-
+export const tryToParseAlphanumericString = (value: unknown): string => {
+	const parsed = tryToParseString(value);
+	const regex = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
+	if (!regex.test(parsed)) {
+		throw new ApplicationError('Value is not a valid alphanumeric string', { extra: { value } });
+	}
+	return parsed;
+};
 export const tryToParseBoolean = (value: unknown): value is boolean => {
 	if (typeof value === 'boolean') {
 		return value;
@@ -180,6 +187,17 @@ export const validateFieldType = (
 				return { valid: false, errorMessage: defaultErrorMessage };
 			}
 		}
+		case 'string-alphanumeric': {
+			try {
+				return { valid: true, newValue: tryToParseAlphanumericString(value) };
+			} catch (e) {
+				return {
+					valid: false,
+					errorMessage:
+						'Value is not a valid alphanumeric string, only letters, numbers and underscore allowed',
+				};
+			}
+		}
 		case 'number': {
 			try {
 				if (strict && typeof value !== 'number') {