Make sure all examples have a description

Signed-off-by: David Gageot <david.gageot@docker.com>

Author: dgageot

examples/shared-todo.yaml

@@ -4,6 +4,7 @@ version: "2"
 agents:
   root:
     model: gpt
+    description: An agent to demonstrate how to setup a shared todo.
     instruction: |
       Here is your workflow:
         - Transfer to the `first` agent, the task should be: create a todo

pkg/config/examples_test.go

@@ -32,6 +32,7 @@ func TestParseExamples(t *testing.T) {
 
 			require.NoError(t, err)
 			require.Equal(t, "2", cfg.Version, "Version should be 2 in %s", file)
+			require.NotEmpty(t, cfg.Agents["root"].Description, "Description should not be empty in %s", file)
 			require.NotEmpty(t, cfg.Agents["root"].Instruction, "Instruction should not be empty in %s", file)
 		})
 	}