Use variables to pass data to your agent directly from your Dataset.
1

Create a dataset with custom variables

Create custom columns of the type Variable in your dataset. All data from these columns would be available as variables in your agent. Dataset with custom variables
2

Use variables in your agent

Use the variables in any of your nodes using the {{variable_name}} syntax. Variables in agent
3

Test your agent

Trigger a test run and view the results. Agent in playground
Any value set in the agent while testing would be overridden by the value from the dataset.