Use one of the following ways to resolve this issue.

Grant execute permission

If you have administrative rights, you can grant the required permission to the user:

USE msdb;

GRANT EXECUTE ON OBJECT::dbo.sp_help_job TO [YourUserName];

Assign SQL Server Agent roles

Alternatively, you can assign the user one of the SQL Server Agent fixed database roles. These roles include SQLAgentUserRole, SQLAgentReaderRole, and SQLAgentOperatorRole.

This can be done through SQL Server Management Studio (SSMS):

1. Go to the msdb database.
2. Navigate to Security > Users.
3. Right-click the user and select Properties.
4. In the Database Role Membership section, check the appropriate role.