diff --git a/prompts/tools-reasoning.md b/prompts/tools-reasoning.md
index 955add0..4596004 100644
--- a/prompts/tools-reasoning.md
+++ b/prompts/tools-reasoning.md
@@ -11,4 +11,6 @@ execute_code: steps=[{tool: "reasoning_think", args: ["your full reasoning here"
 
 **Returns**: nothing. The value is entirely in writing the thought.
 
-**Constraints**: one call per decision point is enough.
+**Constraints**:
+- One call per decision point is enough.
+- Keep thoughts concise — under 200 words. State the decision and key tradeoffs, not a stream-of-consciousness exploration of every option.