search_docs responses can now carry an optional see_also field, a one-sentence pointer to list_targets that appears when the results are target-selection pages. Agents mid-task follow their latest results rather than the tool descriptions they read at the start, so the routing hint rides inside the response. In a routing eval on a multi-GPU vs multi-node target question, agents called list_targets 2 out of 3 times with the field and never without it.
No index schema change; existing indexes remain valid.