string_value: "{\"sdk_http_response\":{\"headers\":{\"Content-Type\":\"application/json; charset=UTF-8\",\"Vary\":\"Origin, X-Origin, Referer\",\"Content-Encoding\":\"gzip\",\"Date\":\"Tue, 16 Jun 2026 19:31:09 GMT\",\"Server\":\"scaffolding on HTTPServer2\",\"X-XSS-Protection\":\"0\",\"X-Frame-Options\":\"SAMEORIGIN\",\"X-Content-Type-Options\":\"nosniff\",\"Transfer-Encoding\":\"chunked\"}},\"candidates\":[{\"content\":{\"parts\":[{\"text\":\"The sum of 2 and 8 is 10.\"}],\"role\":\"model\"},\"finish_reason\":\"STOP\",\"avg_logprobs\":-0.007154934108257294}],\"create_time\":\"2026-06-16T19:31:01.961885Z\",\"model_version\":\"gemini-2.5-flash\",\"response_id\":\"daQxat3aOvGX2PgP5emhgAw\",\"usage_metadata\":{\"candidates_token_count\":13,\"candidates_tokens_details\":[{\"modality\":\"TEXT\",\"token_count\":13}],\"prompt_token_count\":87,\"prompt_tokens_details\":[{\"modality\":\"TEXT\",\"token_count\":87}],\"total_token_count\":100,\"traffic_type\":\"ON_DEMAND\"},\"automatic_function_calling_history\":[{\"parts\":[{\"text\":\"Can you add 2 and 8\"}]},{\"parts\":[{\"function_call\":{\"args\":{\"a\":2,\"b\":8},\"name\":\"add\"},\"thought_signature\":\"CvYBAY89a1-6bioevGFexI0qirCQZV9CU5oDlusZ1O309ukT9szl68aJLG-kVVwAzcM7PKfA6oMgwg5CqX9zeAFNZDJaCtnaJP3bC3UeaVPh0zPqi2jK1IWOCbui3TrDGqKrbuXOnTpj7R5hFpgHbi8ltPlzpCNoxWy3fIXoHIViAtMZdiTC4ZqZbXTVPzX2dQEKh0nlfxg_IlliCWscujSbW9jPtJ7c5sAJvcuPjqyfsFoqTFcROnRzsmdioo-5T9-sP9RdW3_xipjpix7LSLGXA2xd4T9Yoz74Gbs2kIrUhi2BF4DUPL_MFQgalnSmZ-IIu_38CKO0\"}],\"role\":\"model\"},{\"parts\":[{\"function_response\":{\"parts\":null,\"name\":\"add\",\"response\":{\"result\":10}}}],\"role\":\"user\"}]}"