> ## Documentation Index
> Fetch the complete documentation index at: https://docs.weya.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Step 2: Add Tools & Knowledge Base

> Customize your agent’s tone, responsiveness, and base behavior.

* **Knowledge Base:** Provide contexts to your agent using documents, URLs, or text snippets. Learn more in the [Knowledge Base Guide](../knowledgebase/knowledgebase).
* **Tools & Integrations:**

  * **WhatsApp:** Send a post-call message automatically after a call ends.
  * **Google Calendar:** Sync schedules and keep your agent updated.
  * **Call Transfer:** Automatically route calls to the right person.
  * **Custom Tools:** Add and configure your own custom tool.

  Learn more about these in detail in [Tools & Integrations](/tools/postcallwhatsapp).

***