Capture and analyze GPU frames via the devtools-mcp renderdoc backend (RenderDoc). Use when a graphics app (D3D/Vulkan/OpenGL) renders slowly or wrongly and you need the per-drawcall event tree, GPU timings per draw, the resource inventory, a frame thumbnail, or a GPU-time flame graph, captured headlessly, no RenderDoc GUI required. Covers the capture→analyze→counters workflow, the two capture modes, and the GPU/interactive-session prerequisite.
