set up basic workflow execution

apps/cli/src/application/entities/agent.ts

@@ -1,7 +1,34 @@
 import { z } from "zod";
+
+export const BaseAgentTool = z.object({
+    name: z.string(),
+});
+
+export const BuiltinAgentTool = BaseAgentTool.extend({
+    type: z.literal("builtin"),
+});
+
+export const McpAgentTool = BaseAgentTool.extend({
+    type: z.literal("mcp"),
+    description: z.string(),
+    inputSchema: z.any(),
+    mcpServerName: z.string(),
+});
+
+export const WorkflowAgentTool = BaseAgentTool.extend({
+    type: z.literal("workflow"),
+});
+
+export const AgentTool = z.discriminatedUnion("type", [
+    BuiltinAgentTool,
+    McpAgentTool,
+    WorkflowAgentTool,
+]);
+
 export const Agent = z.object({
     name: z.string(),
     model: z.string(),
     description: z.string(),
     instructions: z.string(),
+    tools: z.record(z.string(), AgentTool).optional(),
 });