Ubicloud Measures 92% Tool-Call Schema Accuracy for Kimi K2.6 on vLLM 0.28

Ubicloud reports that serving Kimi K2.6 on vLLM 0.28 produced the expected tool-call schema 92% of the time, so 2 of every 25 attempted calls failed. The findings appear in a blog post dated October 26, 2026. In agent loops, a non-conforming call cannot be dispatched cleanly, so orchestration layers must retry the call or abandon the step.