This record as markdown: /tools/karbassi-slack-mcp/bookmarks-remove.md
What bookmarks_remove does on Slack
AI agents call bookmarks_remove to permanently remove resources in Slack, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why bookmarks_remove is rated Critical
Removing a bookmark deletes metadata irreversibly. While the underlying message persists, the bookmark record itself cannot be recovered through normal means. This is a destructive action affecting channel organization state.
From the tool's definition Tool name 'bookmarks_remove' and description 'Remove a bookmark from a channel' indicate irreversible deletion of bookmark data.
Attacks that exploit this kind of access
The rule that runs bookmarks_remove safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Slack, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For bookmarks_remove, this is the rule to start with:
bookmarks_remove is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Slack, apply this rule, and every bookmarks_remove call is checked against it from then on.
Questions about bookmarks_remove
Remove a bookmark from a channel. It is categorised as a Destructive tool in the Slack MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Slack MCP server in PolicyLayer and add a rule for bookmarks_remove: 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 Slack. Nothing to install.
bookmarks_remove 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 bookmarks_remove 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 bookmarks_remove. 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.
bookmarks_remove is provided by the Slack MCP server (karbassi/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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