feat: adding tool annotation used by MCP

llama_stack/providers/inline/agents/meta_reference/agent_instance.py

@@ -843,6 +843,7 @@ class ChatAgent(ShieldRunnerMixin):
                             )
                             for param in tool_def.parameters
                         },
+                        annotations=tool_def.annotations,
                     )
                     tool_name_to_args[tool_def.identifier] = toolgroup_to_args.get(toolgroup_name, {})
 

llama_stack/providers/inline/agents/meta_reference/openai_responses.py

@@ -665,6 +665,7 @@ class OpenAIResponsesImpl:
                                     },
                                     "required": [p.name for p in t.parameters if p.required],
                                 },
+                                annotations=t.annotations,
                             )
                         )
             else: