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Table Of Contents
30 Agents Every AI Engineer Must Build
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A Knowledge Retrieval agent is the lifeline connecting an LLM's static training data to the living, ever-changing world of information. Think of an LLM as a brilliant scholar with a vast but dated library; the retrieval agent is the assistant who fetches the latest journals and archives to ensure the scholar's answers are fresh and relevant. By linking to live sources such as databases and APIs, these agents directly address two critical weaknesses of language models: knowledge cutoff and the risk of hallucination, anchoring their outputs in verifiable evidence.
Agent capability level
A Knowledge Retrieval agent typically operates at Level 2 (Tool-Using agent) of the Agentic AI Progression Framework, as it can parse requests, select tools (e.g., a search API), and execute chained operations. However, a more advanced agent that decomposes high-level goals (such as "conduct a literature review") and maintains memory across...