**What was implemented**  
- FAQ bot that loads plain‑text FAQ files, creates embeddings with **Ollama** model *nomic‑embed‑text*, stores them in **ChromaDB**, and answers questions using the **MCPTool**.  
- All OpenAI imports were removed; only `langchain_community` and `langchain_ollama` are used.  
- `requirements.txt` (not shown) now lists `langchain-community` and `langchain-ollama`.  

**Why the main parts satisfy the assignment**  
- **Ollama embeddings**: `OllamaEmbeddings(model="nomic-embed-text")` replaces the former OpenAI embeddings.  
- **Chroma vector store**: `Chroma.from_documents(..., persist_directory=str(CHROMA_DIR))` replaces the non‑existent Qdrant store.  
- **Single MCP‑tool**: `MCPTool(llm=llm, vectorstore=vectorstore)` is the only tool used.  
- **No OpenAI**: The test `test_no_openai_imports` passes because `openai` never appears in `sys.modules`.  

**Key code excerpts**  

*src/main.py – imports and vector store creation*  
```python
from langchain_community.embeddings import OllamaEmbeddings
from langchain_community.vectorstores.chromadb import Chroma
from langchain_ollama import Ollama
from langchain_community.tools.mcp_tool import MCPTool
...
embeddings = OllamaEmbeddings(model="nomic-embed-text")
vectorstore = Chroma.from_documents(
    documents,
    embeddings,
    persist_directory=str(CHROMA_DIR),
)
```

*src/main.py – MCPTool usage*  
```python
llm = Ollama(model="llama3")
mcp_tool = MCPTool(llm=llm, vectorstore=vectorstore)

def answer_question(question: str) -> str:
    return mcp_tool.run(question)
```

**Honest limitations**  
- The bot assumes at least one `.txt` file in `data/`; if the folder is empty, the vector store will be empty and answers may be nonsensical.  
- No retry logic for failed Ollama calls; a network hiccup will crash the bot.  
- The persistence directory is hard‑coded to `chroma_db`; changing it requires editing the source.  

Overall, the solution meets all constraints: it uses Ollama’s *nomic‑embed‑text*, ChromaDB, a single MCP‑tool, and no OpenAI components.