diff --git a/src/agent/context.rs b/src/agent/context.rs
index 094d42e..4d8e077 100644
--- a/src/agent/context.rs
+++ b/src/agent/context.rs
@@ -353,7 +353,7 @@ impl AstNode {
             Self::Leaf(leaf) => match &leaf.body {
                 NodeBody::Content(t) => truncate_preview(t, 60),
                 NodeBody::Thinking(t) => format!("thinking: {}", truncate_preview(t, 60)),
-                NodeBody::ToolCall { name, .. } => format!("tool_call: {}", name),
+                NodeBody::ToolCall { name, arguments } => format!("tool: {}({})", name, truncate_preview(arguments, 80)),
                 NodeBody::ToolResult(_) => "tool_result".into(),
                 NodeBody::Memory { key, score, .. } => match score {
                     Some(s) => format!("mem: {} score:{:.1}", key, s),