diff --git a/Environment-Variables.md b/Environment-Variables.md
index 81822af..d35a0a9 100644
--- a/Environment-Variables.md
+++ b/Environment-Variables.md
@@ -123,3 +123,4 @@ can also pass the `--disable-log-colors` flag as well.
 |----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|
 | `AUTO_CONFIRM`       | Bypass all `guard_*` checks in the bash prompt helpers; useful for agent composition and routing. Set automatically when passing `--dangerously-skip-permissions`, `--headless`, or `--acp-server` (Coyote sets `AUTO_CONFIRM=true` for the process and all spawned tools/agents). See [Unattended Mode](Unattended-Mode).        |               |
 | `LLM_TOOL_DATA_FILE` | Set automatically by Coyote on Windows. Points to a temporary file containing the JSON tool call data. <br>Tool scripts (`run-tool.sh`, `run-agent.sh`, etc.) read from this file instead of command-line args <br>to avoid JSON escaping issues when data passes through `cmd.exe` → bash. **Not intended to be set by users.** |               |
+| `COYOTE_SHOW_TOOL_CALLS` | Force tool-call log lines ("Call fs_ls ...") even when stdout is not a terminal, e.g. when running under pueue, cron, or with output piped to a file. Opt in with COYOTE_SHOW_TOOL_CALLS=1 (or "true"). |               |