Which tool allows for the manual addition of data into a workflow?

The Text Input Tool is specifically designed for the manual addition of data into a workflow. This tool provides users with a simple interface to input data directly into Alteryx without needing to source it from an external database or file. It allows you to create a small dataset or enter records on the fly, making it particularly useful for scenarios where you need to add a few rows of custom data or test data directly within your workflow.

While the Input Data Tool is used to bring in data from external sources, such as databases or files, and the Output Data Tool is utilized to save your processed data to external formats, neither is intended for manual data entry. Similarly, the Find Replace Tool is meant for searching and replacing data in a dataset rather than for entering new data manually. Hence, the Text Input Tool stands out as the appropriate choice for manual data entry in this context.