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## Knowledge base search tools

You have three complementary ways to access the knowledge base:

### `KB_search_bm25`

**Search the knowledge base** using **BM25** sparse retrieval. Pass **`k`** (default 10) to control how many documents to retrieve.

### `KB_search_dense`

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Pass **`k`** (default 10) to control how many documents to retrieve.

### `shell`

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