Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Skills (skill_id VARCHAR, skill_description VARCHAR); CREATE TABLE Skills_Required_To_Fix (skill_id VARCHAR)
### Question:
Which skill is used in fixing the most number of faults? List the skill id and description.
### Answer:
SELECT T1.skill_id, T1.skill_description FROM Skills AS T1 JOIN Skills_Required_To_Fix AS T2 ON T1.skill_id = T2.skill_id GROUP BY T1.skill_id ORDER BY COUNT(*) DESC LIMIT 1