# Parameters

If you have to change eva’s behavior, you can create new system parameters. A parameter is a value that is added to configure software behavior. Here, a developer can insert any value to change how eva behaves.  

To create a parameter, first click on the “create parameter” button. Then, a card will appear. Insert the parameter key, value and, if you desire, a description. Then, click “save”. You can enable and disable any parameter later.

![Parameters' screen](/files/a9aMewvtDGGtfnWNotix)

In the parameter tab, you can also set the minimum confidence score for the NLP and Automated Learning.

![Minimum confidence score](/files/HQsOy4QG2xvjGLCNP1Vd)

In a NLP, this is a minimum level of certainty that an intent corresponds to what a user is saying. In the Automated Learning, it is the minimum level of certainty that the answer being delivered corresponds to what the user is asking. If the confidence score is below the value set, a not expected answer will be delivered. You can set the value by moving the bar.


---

# 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-conversational-ai.syntphony.com/_eva-3.4.1_1/using-eva/advanced-options/parameters.md?ask=<question>
```

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.