diff --git a/packages/abilities/src/store/actions.ts b/packages/abilities/src/store/actions.ts
index 59b850b43a973e..9c6ca30880be75 100644
--- a/packages/abilities/src/store/actions.ts
+++ b/packages/abilities/src/store/actions.ts
@@ -61,7 +61,7 @@ export function registerAbility( ability: Ability ) {
 		// Validate name format matches server implementation
 		if ( ! ABILITY_NAME_PATTERN.test( ability.name ) ) {
 			throw new Error(
-				'Ability name must be a string containing a namespace prefix, i.e. "my-plugin/my-ability". It can only contain lowercase alphanumeric characters, dashes and the forward slash.'
+				'Ability name must be a string containing a namespace prefix with 2-4 segments, e.g. "my-plugin/my-ability" or "core/posts/find". It can only contain lowercase alphanumeric characters, dashes and the forward slash.'
 			);
 		}
 
diff --git a/packages/abilities/src/store/constants.ts b/packages/abilities/src/store/constants.ts
index 38a42310f3fe12..8bc2a2dc744dd7 100644
--- a/packages/abilities/src/store/constants.ts
+++ b/packages/abilities/src/store/constants.ts
@@ -4,7 +4,7 @@
 export const STORE_NAME = 'core/abilities';
 
 // Validation patterns
-export const ABILITY_NAME_PATTERN = /^[a-z0-9-]+\/[a-z0-9-]+$/;
+export const ABILITY_NAME_PATTERN = /^[a-z0-9-]+(?:\/[a-z0-9-]+){1,3}$/;
 export const CATEGORY_SLUG_PATTERN = /^[a-z0-9]+(?:-[a-z0-9]+)*$/;
 
 // Action types
diff --git a/packages/abilities/src/store/tests/actions.test.ts b/packages/abilities/src/store/tests/actions.test.ts
index 8d29a0ca1ff58b..d80585467f20c6 100644
--- a/packages/abilities/src/store/tests/actions.test.ts
+++ b/packages/abilities/src/store/tests/actions.test.ts
@@ -141,8 +141,8 @@ describe( 'Store Actions', () => {
 
 		it( 'should validate and reject ability with invalid name format', () => {
 			const testCases = [
-				'invalid', // No namespace
-				'my-plugin/feature/action', // Multiple slashes
+				'invalid', // No namespace (only 1 segment)
+				'my-plugin/a/b/c/d', // Too many slashes (5 segments)
 				'My-Plugin/feature', // Uppercase letters
 				'my_plugin/feature', // Underscores not allowed
 				'my-plugin/feature!', // Special characters not allowed
@@ -170,6 +170,39 @@ describe( 'Store Actions', () => {
 			}
 		} );
 
+		it( 'should accept valid nested namespace ability names (2-4 segments)', () => {
+			const validNames = [
+				'test/ability', // 2 segments
+				'core/posts/find', // 3 segments
+				'my-plugin/resource/action', // 3 segments
+				'my-plugin/resource/sub/action', // 4 segments
+			];
+
+			for ( const validName of validNames ) {
+				const ability: Ability = {
+					name: validName,
+					label: 'Test Ability',
+					description: 'Test description',
+					category: 'test-category',
+					callback: jest.fn(),
+				};
+
+				mockSelect.getAbility.mockReturnValue( null );
+				mockDispatch.mockClear();
+
+				const action = registerAbility( ability );
+				action( { select: mockSelect, dispatch: mockDispatch } );
+
+				expect( mockDispatch ).toHaveBeenCalledWith( {
+					type: REGISTER_ABILITY,
+					ability: {
+						...ability,
+						meta: { annotations: { clientRegistered: true } },
+					},
+				} );
+			}
+		} );
+
 		it( 'should validate and reject ability without label', () => {
 			const ability: Ability = {
 				name: 'test/ability',
diff --git a/packages/abilities/src/types.ts b/packages/abilities/src/types.ts
index 72531f23fc03c3..82b8b597a3a210 100644
--- a/packages/abilities/src/types.ts
+++ b/packages/abilities/src/types.ts
@@ -25,7 +25,7 @@ export type PermissionCallback = (
 export interface Ability {
 	/**
 	 * The unique name/identifier of the ability, with its namespace.
-	 * Example: 'my-plugin/my-ability'
+	 * Supports 2-4 segments (e.g. 'my-plugin/my-ability', 'core/posts/find', 'my-plugin/resource/sub/action').
 	 * @see WP_Ability::get_name()
 	 */
 	name: string;