AGENTS.md: tool-eval-bench runs in a separate dir, never in this repo

AGENTS.md

@@ -517,3 +517,4 @@ the detect command per node and renders `NCCL_IB_GID_INDEX=auto`.
 - Files ≤500 lines (enforced by `make check-lines`); extract submodules when a file approaches the limit
 - `#![deny(clippy::wildcard_imports)]` — no `use foo::*;`
 - **Clippy warnings**: solve by refactoring the code (extract structs, reduce arg count, restructure logic). Do **not** add `#[allow(...)]` attributes. If the only viable fix is an allow attribute, consult the user for guidance.
+- **tool-eval-bench runs happen in a separate working dir, never in this repo** — its output (e.g. `data/benchmarks.sqlite`) is not for this repo; a stray run here pollutes the working tree.