Brave engineer on MCP tool poisoning: pre-execution model review and a 4GB local guard model
gnukeith · x · 2026-10-26
Brave engineer gnukeith warns about MCP tool poisoning and prompt injection: you rarely need an extra guard layer, but you'll wish you had one the moment you're injected. The attached screenshot shows OpenRouter Armor, which uses typesafeai's Jev model to review every tool call before execution, catching unsafe calls that regex filtering misses. Brave internally runs a review model before letting models like Sonnet fully execute tasks. He is also training a local guard model that runs on 4GB RAM/VRAM with promising early results. His advice: secure your systems before something happens, even for hypothetical attacks.
More from coding & agent
- Reddit asks: Why can't AI coding agents run locally like Stable Diffusion? — Kaporalhart · 2026-10-26
- Local Qwen2.5-Coder-14B + deterministic C# validator kills hallucinations on a single 24GB A10 — Intelligent_Boss4602 · 2026-10-26
- Matt Shumer launches email-based 'AI employee' for SMBs that works autonomously in your inbox — mattshumer_ · 2026-10-26
- FOSS local-first OmniImage organizes 40k+ ComfyUI outputs with offline CLIP search — MatheusWMac · 2026-10-26
- Theo fires back at Opus 5.5 critics with list of 8 projects shipped in a month — Vjeux · 2026-10-26
- Vjeux joins Muse Open Kernel Challenge; colinlikescode leads 4 of 5 problems — Vjeux · 2026-10-26