# Use string interpolation {% embed url="" %} You can format strings in Hypertune with arguments defined in your schema. To create a formatted string, define an argument on the string field itself or one of its parent fields, e.g. in the `Context`. Then implement the string's logic with a Text Chain expression. Open the menu on the Text Chain to add an empty expression that you can set to an argument. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.hypertune.com/guides/use-string-interpolation.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.