Dev writes up Query Studio: a LangChain MCP SQL agent with read-only safeguards
Top-Plan-229 · reddit · 2026-11-07
A developer shared a full writeup of Query Studio, a conversational database agent built with LangChain MCP that lets you talk to your data.
Key design decisions covered:
- Schema-aware SQL generation to reduce hallucinated queries
- Read-only safeguards so the agent can't mutate production data
- Multi-turn follow-up conversations over results
- Keeping SQL and results visible for inspection instead of a black box
The author also discusses what could be improved — useful reference for anyone building a text-to-SQL agent.
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