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

# Knowledge and tools

> Grounding and controlled actions for agents

Agents combine **what they know** (documents, policies, catalogs) with **what they can do** (lookups, bookings, tickets). Keeping those two concerns explicit helps B2C teams evolve assistants without surprise behavior.

## Knowledge

Ground answers in **approved content**: help articles, policy PDFs, product catalogs, or curated URLs. Refresh content on a schedule that matches how often your business changes.

## Tools

Tools are **discrete actions** the assistant may request. Good tools are **small**, **idempotent when possible**, and **easy to monitor** in production.

## Safety and quality

* Treat tool inputs as **untrusted** until validated by your services.
* Rate-limit downstream systems so viral traffic does not become an outage.
* Review transcripts regularly for **unexpected tool use** and **user confusion**.

## Related

<CardGroup cols={2}>
  <Card title="Agents overview" icon="robot" href="/agents/overview" />

  <Card title="MCP for B2C" icon="plug" href="/get-started/mcp-for-b2c" />
</CardGroup>