Fix test-dispatcher workflow prompt to explicitly call dispatch_workflow tool

.github/workflows/test-dispatcher.md

@@ -14,4 +14,27 @@ safe-outputs:
 # Test Dispatcher Workflow
 
 This workflow demonstrates the dispatch-workflow safe output capability.
-The agent can trigger the test-workflow using the test_workflow tool.
+
+**Your task**: Call the `dispatch_workflow` tool to trigger the `test-workflow` workflow.
+
+**Important**: You MUST use the safe output tool - do NOT write to files or attempt other methods.
+
+## Instructions
+
+1. **Call the safe output tool**: Use `dispatch_workflow` to trigger the test-workflow
+2. **Workflow name**: Specify `test-workflow` as the workflow to dispatch
+3. **Inputs (optional)**: You can provide test parameters if needed, but they are optional
+
+## Example
+
+The agent should call the `dispatch_workflow` tool like this:
+
+```json
+{
+  "type": "dispatch_workflow",
+  "workflow_name": "test-workflow",
+  "inputs": {
+    "test_param": "example value"
+  }
+}
+```