Knime recently deprecated a bunch of AI nodes, specifically related to creating RAG agentic systems, like the “Vector store to Tool” node that let the agent access vector stores as tools, and also removed the “tool concatenate” node, that allowed the the agent to access multiple vector stores. What is the new approach to giving agents access to vector stores in knime after 5.5?
Any help will be greatly appreciated. My original workflow was built based on: RAG Agent
Hi @PanteleyShmele1,
Since Vector Store to Tool (and Tool Concatenate) are deprecated in the new agentic framework, the way to replace them is to use a small “tool workflow” that queries your vector store:
- Build a workflow that takes a query as input, uses the Vector Store Retriever to search your vector store, and returns the retrieved context/answer.
- Put that workflow in a Tools folder.
- In your agent workflow, list the workflows in that folder and convert them to tools with Workflow to Tool. (Each workflow = one tool the agent can call.)
Examples
For multiple vector stores, either create one tool workflow per store or make a single parameterized tool (e.g., store_id) that selects the vector DB internally based on the parameter value.
Hope this helps!
Best,
Keerthan
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