# QA: Tool Rendering (Reasoning Chain) — LangGraph (Python) > Stub — authored for column completeness. This is a testing-kind demo > (see `kind: "testing"` in feature-registry.json) and does not warrant a > full manual checklist. ## Prerequisites - Demo is deployed and accessible - Agent backend is healthy ## Test Steps - [ ] Navigate to /demos/tool-rendering-reasoning-chain - [ ] Send a multi-tool prompt (e.g. "What's the weather in Tokyo?") and verify reasoning blocks interleave with sequential tool cards (`WeatherCard`, `FlightListCard`, or the custom catchall) - [ ] Verify reasoning tokens stream into the custom `ReasoningBlock` slot alongside the tool cards in the same message view ## Expected Results - Page loads without errors - Reasoning tokens and tool-call cards render side-by-side in a single sequential chain, each tool matched to its typed renderer