Agentic AI Reference Architecture

Tools & Integration · Data store

Tool Usage History Store

Data storeTools & IntegrationOrchestration & Toolsarc:ToolUsageHistoryStore

A graph-structured data store recording which tools solved which queries, with success, helpfulness, latency, and error properties.

Responsibility. Records historical tool invocation outcomes per query.

Also known as: Tool Success Graph

is written byis read byis read byTool Executor: is written byTool ExecutorTask Planner: is read byTask PlannerTool Selector: is read byTool Selector
Direct neighbourhood (hover for relationship types)

Relationships

is read by dependency

is written by dependency

Classification

Patterns
(Query)-[:SOLVED_BY]->(Tool)-[:RETURNED]->(Result)
Technologies
Neo4j
Quality attributes
Flexibility (ISO/IEC 25010)

Sources

  1. Ch1.7B: T. Nguyen, "Relational Reasoning with Knowledge Graphs - Hybrid RAG+KG Integration," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 1.7B. ISBN: 9798244538229.