diff --git a/libs/tools/generator/core/src/metadata/index.ts b/libs/tools/generator/core/src/metadata/index.ts
index 5b5d6c7786e..17c02918705 100644
--- a/libs/tools/generator/core/src/metadata/index.ts
+++ b/libs/tools/generator/core/src/metadata/index.ts
@@ -10,13 +10,25 @@ import password from "./password/random-password";
 import { CredentialType, CredentialAlgorithm } from "./type";
 import effWordList from "./username/eff-word-list";
 
-export const BuiltIn = {
+/** Credential generators hosted natively by the credential generator system.
+ *  These are supplemented by generators from the {@link ExtensionService}.
+ */
+export const BuiltIn = Object.freeze({
+  /** Catchall email address generator */
   catchall,
+
+  /** plus-addressed email address generator */
   plusAddress,
+
+  /** passphrase generator using the EFF word list */
   passphrase,
+
+  /** password generator */
   password,
+
+  /** username generator using the EFF word list */
   effWordList,
-};
+});
 
 // `CredentialAlgorithm` is defined in terms of `ABT`; supplying
 // type information in the barrel file breaks a circular dependency.
@@ -25,9 +37,17 @@ export const AlgorithmsByType: Record<
   CredentialType,
   ReadonlyArray<CredentialAlgorithm>
 > = AlgorithmsByTypeData;
+
+/** A list of all built-in algorithm identifiers
+ *  @remarks this is useful when you need to filter invalid values
+ */
 export const Algorithms: ReadonlyArray<CredentialAlgorithm> = Object.freeze(
   Object.values(AlgorithmData),
 );
+
+/** A list of all built-in algorithm types
+ *  @remarks this is useful when you need to filter invalid values
+ */
 export const Types: ReadonlyArray<CredentialType> = Object.freeze(Object.values(TypeData));
 
 export { Profile, Type, Algorithm } from "./data";