diff --git a/src/skills/grill/SKILL.md b/src/skills/grill/SKILL.md
index 5844aa3..305d3bf 100644
--- a/src/skills/grill/SKILL.md
+++ b/src/skills/grill/SKILL.md
@@ -27,6 +27,6 @@ Word each question so "yes" accepts your recommended answer.
 
 Each user answer reshapes the tree: settled decisions push the frontier outward and unblock questions that depended on them. Update the design tree in the file before asking the next question. A question whose answer depends on another open question belongs in the non-frontier, not the frontier.
 
-Finding _facts_ is your job, never the user's. When a question needs a fact from the environment, find it with available tools; don't ask the user for anything you could look up yourself. The _decisions_ are the user's: put each to them and wait.
+Finding _facts_ is your job, never the user's. When a frontier question needs a fact from the environment (filesystem, tools, etc.), find it with available tools; don't ask the user for anything you could look up yourself. The _decisions_ are the user's: put each to them and wait.
 
 The session is done when the frontier is empty: every branch of the design tree visited, nothing left silently assumed. Do not act on it until the user confirms you have reached a shared understanding.