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# Building an Agent-Ready Data Warehouse: What Traditional Architectures Do Wrong

**[Towards Data Science](https://daily.dev/sources/tds)** · 10 min read · 1 upvotes · 0 comments

## Summary

Giving an AI agent access to a data warehouse doesn't make it agent-ready. The core problem is that warehouses expose queryable data but not the business rules needed to interpret it correctly — leading to valid SQL producing wrong decisions. The post introduces the concept of a 'decision contract' that specifies approved data sources, metric definitions, freshness requirements, completeness checks, and action boundaries. It also recommends placing a semantic interface in front of raw tables, adding a query execution safety layer, separating recommendation from action using least-privilege principles, and capturing full interaction traces rather than just SQL logs. The practical advice is to start with a single, well-scoped decision rather than exposing the entire warehouse to agents.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://towardsdatascience.com/building-an-agent-ready-data-warehouse-what-traditional-architectures-do-wrong>

## Questions this post answers

### Why can an AI agent write correct SQL but still recommend the wrong business action?

An agent can generate valid SQL and calculate a metric correctly, yet still act on incomplete or misinterpreted data because the warehouse schema does not encode business rules like currency normalization, attribution windows, refund deductions, or data completeness. For example, an agent might select raw source tables over a governed dashboard view because table names match the question more closely, even though those raw tables have not fully loaded conversions yet.

_daily.dev surfaces practical guidance for engineers designing safer AI agent access to analytics data._

### What is a decision contract in the context of AI agents querying a data warehouse?

A decision contract specifies how an automated system may use warehouse data for a particular class of decisions, going beyond a data contract that only defines what a producer must deliver. It sets the approved data source, minimum historical time frame, metric definitions, allowed data age, required completeness checks, permitted filters, and whether the agent may only recommend an action or also execute it.

_Engineers designing agent governance can track evolving patterns like decision contracts on daily.dev._

### How should permissions differ between an AI agent that recommends an action and one that executes it?

An agent that reads and interprets data should not automatically have permission to update operational systems; recommendation and execution should be handled by separate services. Following least-privilege principles for AI agents, each agent should get its own identity, limited permissions, audit logs, controlled tool access, and revocable access, with a separate approval service verifying identity and policy before any action executes.

_Teams enforcing least-privilege AI agent access can follow related architecture discussions on daily.dev._

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---

Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#big-data](https://daily.dev/tags/big-data), [#data-engineering](https://daily.dev/tags/data-engineering), [#data-warehouse](https://daily.dev/tags/data-warehouse), [#data-architecture](https://daily.dev/tags/data-architecture)

[View this post on daily.dev](https://daily.dev/posts/building-an-agent-ready-data-warehouse-what-traditional-architectures-do-wrong-hkkilhuso)

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