diff --git a/crates/ra_syntax/src/ast/generated/nodes.rs b/crates/ra_syntax/src/ast/generated/nodes.rs
index dbb009b688..4bcdbd495d 100644
--- a/crates/ra_syntax/src/ast/generated/nodes.rs
+++ b/crates/ra_syntax/src/ast/generated/nodes.rs
@@ -1872,7 +1872,8 @@ impl Attr {
     pub fn input(&self) -> Option<AttrInput> { support::child(&self.syntax) }
     pub fn r_brack_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![']']) }
 }
-/// // TODO: clarify on this AST type @edwin0cheng
+/// Stores a list of lexer tokens and other `TokenTree`s.
+/// It appears in attributes, macro_rules and macro call (foo!)
 ///
 /// ```
 /// macro_call! ❰ { my syntax here } ❱;
diff --git a/xtask/src/ast_src.rs b/xtask/src/ast_src.rs
index ed1bac0912..47a5d1d91d 100644
--- a/xtask/src/ast_src.rs
+++ b/xtask/src/ast_src.rs
@@ -1577,7 +1577,8 @@ pub(crate) const AST_SRC: AstSrc = AstSrc {
         /// [Reference](https://doc.rust-lang.org/reference/attributes.html)
         struct Attr { T![#], T![!], T!['['], Path, T![=], input: AttrInput, T![']'] }
 
-        /// // TODO: clarify on this AST type @edwin0cheng
+        /// Stores a list of lexer tokens and other `TokenTree`s.
+        /// It appears in attributes, macro_rules and macro call (foo!)
         ///
         /// ```
         /// macro_call! ❰ { my syntax here } ❱;