integrate connectors api within responses api impl in agentic provider

Signed-off-by: Jaideep Rao <jrao@redhat.com>

docs/static/deprecated-llama-stack-spec.yaml

@@ -4039,8 +4039,13 @@ components:
           type: string
           title: Server Label
         server_url:
-          type: string
-          title: Server Url
+          anyOf:
+          - type: string
+          - type: 'null'
+        connector_id:
+          anyOf:
+          - type: string
+          - type: 'null'
         headers:
           anyOf:
           - additionalProperties: true
@@ -4073,7 +4078,6 @@ components:
       type: object
       required:
       - server_label
-      - server_url
       title: OpenAIResponseInputToolMCP
       description: Model Context Protocol (MCP) tool configuration for OpenAI response inputs.
     CreateOpenaiResponseRequest: