diff --git a/.env.example b/.env.example
index e8e0793..6e15b99 100644
--- a/.env.example
+++ b/.env.example
@@ -28,7 +28,7 @@ ARTEX_LLM_PROXY=
 # probe). Default off: no limit, requests unchanged. quiet = 2 req/s per host, burst 4,
 # 1 in flight; balanced = 5 req/s, burst 10, 2 in flight; aggressive = 20 req/s, burst 40,
 # 4 in flight. A profile also adds jitter, backs off on 429/503 and merges identical GETs
-# of one task (short cache). Bash-launched tools are not throttled.
+# of one task (short cache, not for WebFetch). Bash-launched tools are not throttled.
 # ARTEX_NOISE_PROFILE=balanced
 # User-Agent set on target requests that have none, only under a profile. Empty = unchanged.
 # ARTEX_TARGET_USER_AGENT=
diff --git a/README.md b/README.md
index 07cff9b..38d1133 100644
--- a/README.md
+++ b/README.md
@@ -264,7 +264,7 @@ Optional: `ARTEX_LLM_PROVIDER` (anthropic | openai | openai-responses | ollama)
 
 **Untrusted-output boundary (on by default)**: tool results for the worker, planner, chat and main agent are framed between nonce-tagged markers so the model treats them as data, not instructions. Unset or empty, the boundary is on; set `ARTEX_UNTRUSTED_BOUNDARY=0` (or `false` / `off` / `no`) to disable it. Measured cost: about 154 bytes per tool result plus one system note.
 
-**Noise profile (off by default)**: `ARTEX_NOISE_PROFILE` paces the requests ARTEX itself sends to targets (WebFetch, http custom tools, the enrich probe). Unset or `off`, nothing changes: no limit, no cache. Set `quiet` (2 req/s per host, burst 4, 1 in flight), `balanced` (5 req/s, burst 10, 2 in flight) or `aggressive` (20 req/s, burst 40, 4 in flight), e.g. `ARTEX_NOISE_PROFILE=balanced` in `.env` or the environment. A profile also adds a small jitter, backs off on 429/503 (honouring `Retry-After`, bounded retries, GET/HEAD/OPTIONS only), merges identical GETs of one task and caches them briefly (60/30/10 s; never POST, PUT, PATCH or DELETE), and logs a per-host noise line each minute. `ARTEX_TARGET_USER_AGENT` sets a User-Agent on target requests that carry none, under a profile; empty keeps the current one. Tools launched through Bash are not paced yet.
+**Noise profile (off by default)**: `ARTEX_NOISE_PROFILE` paces the requests ARTEX itself sends to targets (WebFetch, http custom tools, the enrich probe). Unset or `off`, nothing changes: no limit, no cache. Set `quiet` (2 req/s per host, burst 4, 1 in flight), `balanced` (5 req/s, burst 10, 2 in flight) or `aggressive` (20 req/s, burst 40, 4 in flight), e.g. `ARTEX_NOISE_PROFILE=balanced` in `.env` or the environment. A profile also adds a small jitter, backs off on 429/503 (honouring `Retry-After`, bounded retries, GET/HEAD/OPTIONS only), merges identical in-flight GETs of one task and, for the http custom tools and the enrich probe, caches them briefly (60/30/10 s; WebFetch results are never cached; never POST, PUT, PATCH or DELETE), and logs a per-host noise line each minute. `ARTEX_TARGET_USER_AGENT` sets a User-Agent on target requests that carry none, under a profile; empty keeps the current one. Tools launched through Bash are not paced yet.
 
 **Common flags**: `./start.sh -addr :8787 -proxy :8788` (`-addr` frontend+API, `-proxy` traffic recording proxy). The startup script passes arguments through to `artex` verbatim.