The EXECUTE permission was denied on the object 'xp_sqlagent_enum_jobs' - SQL Server

Recently while working with one query to get schedule jobs status, i used xp_sqlagent_enum_jobs object which gives details of state values of all jobs in msdb database and this is undocumented object. But received an error while running following query for same,

EXECUTE master.dbo.xp_sqlagent_enum_jobs 1,'sa';

Error :

Msg 229, Level 14, State 5, Procedure xp_sqlagent_enum_jobs, Line 1
The EXECUTE permission was denied on the object 'xp_sqlagent_enum_jobs', database 'mssqlsystemresource', schema 'sys'.

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