MCP security warning: readOnlyHint is not a boundary; enforce least-privilege roles below the model

WirelessLife · x · 2026-08-18

Regarding MCP (Model Context Protocol) server security, readOnlyHint=True is not a true security boundary. If agents can write SQL, safety must be enforced below the model using read-only transactions and least-privilege roles. The post references Pamela Fox's article for detailed trade-offs.

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