brain-mcp-tools-do-not-exist-use-vault-mcp
Tool names brain_search_learnings, brain_list_pending_handoffs, brain_submit_learning, brain_record_decision do not exist in the system. These were stale references from a prior architecture. The correct server is vault-mcp with vault_* tool prefix. These broken references were found in aj-ea CLAUDE.md, aj-ea MEMORY.md, aj-ea feedback_st_proactive_use.md, and aj-workspace feedback_st_proactive_use.md — silently failing across both workspaces.
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