diff --git a/src/aliases.ts b/src/aliases.ts
index 9e990786..05e1477b 100644
--- a/src/aliases.ts
+++ b/src/aliases.ts
@@ -4,6 +4,12 @@ export function commandIsAlias(command: string): boolean {
     return Config.get("exaliases", command) !== undefined
 }
 
+/**
+ * Expands the alias in the provided exstr recursively. Does nothing if
+ * the command is not aliased, including when the command is invalid.
+ * 
+ * @param exstr :exstr typed by the user on the commantd line
+ */
 export function expandExstr(exstr: string): string {
     // Split on whitespace
     const [command, ...args] = exstr.trim().split(/\s+/)
@@ -14,6 +20,12 @@ export function expandExstr(exstr: string): string {
     return expandedExstr
 }
 
+/**
+ * Expands the given command recursively. Does nothing if the command is not
+ * aliased, including when it is invalid. 
+ * 
+ * @param command The command portion of the exstr
+ */
 export function getAliasExpandRecur(command: string): string {
     // Base case: alias not found; return original command
     if(!commandIsAlias(command)) {