What should be used to programmatically change columns that end with "Key" in a semantic model?

To programmatically change columns that end with "Key" in a semantic model, using Tabular Editor is the most appropriate choice. Tabular Editor is a powerful tool specifically designed for editing and managing tabular models, including those used in Microsoft Analysis Services and Power BI. It provides an intuitive interface for making bulk changes to model structures, properties, and hierarchies, which can be efficiently done through its scripting capabilities.

The ability to execute C# scripts allows users to quickly identify and modify multiple columns that meet specific criteria, such as those with names ending in "Key." This offers significant time savings and reduces the likelihood of manual errors that can occur when changes are made individually within a graphical interface.

In comparison, while Microsoft Power BI Desktop can manage model changes, it does not offer the same level of programmatic automation when it comes to bulk edits. ALM Toolkit is primarily focused on model comparison and deployment rather than direct editing of model elements. DAX Studio is utilized mainly for writing and executing DAX queries, and while it has some model exploration capabilities, it does not support the bulk modification of model columns as directly as Tabular Editor does.