Why would a coding agent ignore a retrieval interface that returns more precise results? I explored this question in a small study comparing lexical search with grep against LSP-backed semantic navigation. I expected semantic navigation to reduce noise and save tokens. Instead, agents often stayed with grep. When I forced them to use the semantic path first, task success sometimes fell. This is a question of LLM-friendliness. A tool is not friendly to a model merely because its results are preci...