# Retrievals from Knowledge Search Blocks

## Knowledge Search Block

Search blocks allow Callables to make queries to uploaded Knowledges.

<figure><img src="/files/5PXAZU2gtlMRrR810Zft" alt=""><figcaption></figcaption></figure>

Search Blocks consist of the following fields:

* **Query:** Provide the desired prompt to look for inside your knowledges
* **Knowledge:** Add and select as many knowledges that you have created. Allows for specific include or exclude tags to better refine your retrieval.

<figure><img src="/files/AQuLSK6n8kdLWWneOeSr" alt=""><figcaption></figcaption></figure>


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# 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.trycortex.ai/callable/use-cases/retrievals-from-knowledge-search-blocks.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.