Remove a post from the authenticated user bookmarks.
AI agents call deleteUsersBookmark to permanently remove resources in Xdevplatform/xmcp — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing a bookmark is an irreversible deletion action — the bookmark is removed from the user's saved collection. While the underlying post still exists, the bookmark entry itself is destroyed and cannot be automatically restored, placing this in the Destructive category. Severity is medium since it only affects the authenticated user's personal bookmark list.
From the tool's definition "Remove a post from the authenticated user bookmarks"
Attacks that exploit this kind of access
Remove a post from the authenticated user bookmarks. It is categorised as a Destructive tool in the Xdevplatform/xmcp MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Xdevplatform/x MCP server in PolicyLayer and add a rule for deleteUsersBookmark: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Xdevplatform/xmcp. Nothing to install.
deleteUsersBookmark is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the deleteUsersBookmark rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for deleteUsersBookmark. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
deleteUsersBookmark is provided by the Xdevplatform/x MCP server (xdevplatform/xmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
deleteUsersBookmark is one line of Xdevplatform/x's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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