Security Scan: A Third of Public MCP Servers Lack Safety Hints
Dear-Potential2625 · reddit · 2026-08-24
A security scan of 23 public MCP (Model Context Protocol) servers revealed concerning gaps in safety declarations. About one-third hosted at least one tool with zero safety hints—no readOnlyHint or destructiveHint. Some tools described destructive actions (like deleting customer accounts) without flagging them in the schema, leaving agents with no signal that they are about to perform irreversible operations. The author also notes that server configurations can change after an agent is already connected, posing ongoing risks.
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