diff --git a/barretenberg/ts/src/types/fields.ts b/barretenberg/ts/src/types/fields.ts
index ef9d9188ced..ed4eec2ace0 100644
--- a/barretenberg/ts/src/types/fields.ts
+++ b/barretenberg/ts/src/types/fields.ts
@@ -3,6 +3,11 @@ import { toBigIntBE, toBufferBE } from '../bigint-array/index.js';
 import { BufferReader, uint8ArrayToHexString } from '../serialize/index.js';
 
 // TODO(#4189): Replace with implementation in yarn-project/foundation/src/fields/fields.ts
+/**
+ * Fr field class.
+ * @dev This class is used to represent elements of BN254 scalar field or elements in the base field of Grumpkin.
+ * (Grumpkin's scalar field corresponds to BN254's base field and vice versa.)
+ */
 export class Fr {
   static ZERO = new Fr(0n);
   static MODULUS = 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001n;
@@ -57,6 +62,11 @@ export class Fr {
   }
 }
 
+/**
+ * Fq field class.
+ * @dev This class is used to represent elements of BN254 base field or elements in the scalar field of Grumpkin.
+ * (Grumpkin's scalar field corresponds to BN254's base field and vice versa.)
+ */
 export class Fq {
   static MODULUS = 0x30644e72e131a029b85045b68181585d97816a916871ca8d3c208c16d87cfd47n;
   static MAX_VALUE = this.MODULUS - 1n;
diff --git a/yarn-project/foundation/src/fields/fields.ts b/yarn-project/foundation/src/fields/fields.ts
index 42584f5f584..436003adbfd 100644
--- a/yarn-project/foundation/src/fields/fields.ts
+++ b/yarn-project/foundation/src/fields/fields.ts
@@ -190,6 +190,8 @@ export interface Fr {
 
 /**
  * Fr field class.
+ * @dev This class is used to represent elements of BN254 scalar field or elements in the base field of Grumpkin.
+ * (Grumpkin's scalar field corresponds to BN254's base field and vice versa.)
  */
 export class Fr extends BaseField {
   static ZERO = new Fr(0n);
@@ -299,6 +301,8 @@ export interface Fq {
 
 /**
  * Fq field class.
+ * @dev This class is used to represent elements of BN254 base field or elements in the scalar field of Grumpkin.
+ * (Grumpkin's scalar field corresponds to BN254's base field and vice versa.)
  */
 export class Fq extends BaseField {
   static ZERO = new Fq(0n);