Europe 2026
Agentic Search for Context Engineering — Leonie Monigatti, Elastic
Overview
This talk explores agentic search as a critical component of context engineering for Large Language Models (LLMs). The core thesis is that effective context curation for LLMs relies heavily on sophisticated search mechanisms, moving beyond simple retrieval to agent-driven exploration of diverse information sources. The presentation highlights the evolution from basic RAG to agentic RAG and emphasizes the challenges and strategies for building robust search tools that agents can effectively utilize.
Who should watch
- AI engineers building agents.
- Product managers defining agent capabilities.
- Developers working with LLMs and retrieval systems.
- Anyone interested in improving LLM context management.
- Those facing challenges with agent tool selection and parameter generation.
Key takeaways
- Context engineering is significantly powered by agentic search, which determines what information enters an LLM's context window.
- The evolution from fixed retrieval pipelines (RAG) to agentic RAG allows agents to dynamically decide when and what to search.
- Agents can leverage a variety of context sources, including local files, databases, the web, and long-term memory, each requiring specific search tools.
- The shell tool (or exec tool) offers versatility by allowing agents to execute terminal commands, enabling navigation and data retrieval from local file systems and CLIs.
- Building effective search tools requires careful consideration of tool descriptions, parameter complexity, and error handling to prevent agent failures.
- A balanced approach to tool curation involves a combination of specialized tools with a "low floor" for common tasks and general-purpose tools with a "high ceiling" for complex or unexpected queries.
- For unknown agent query behavior, starting with general-purpose tools and logging agent interactions can reveal patterns that inform the development of more specialized tools.
- Agent skills, when integrated, can provide agents with detailed instructions and syntax rules, improving their ability to use complex tools like database query languages.
Notable quotes
*Context engineering is about 80% agentic search.*
*Doing good search is incredibly difficult.*
Unofficial community note. Prefer the recording for nuance.