AI agents use detach-tag-from-bookmark to create or update resources in Karakeep MCP server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Karakeep MCP server environment.
This tool modifies data (removes a tag-to-bookmark association) but does so reversibly—the tag can be re-attached. It does not execute code, delete the bookmark itself, or cause financial effects. It fits the Write category as it updates/modifies data. Severity is low because the blast radius of misuse is minimal; removing a tag from a bookmark has no cascading destructive effects and is easily reversible.
From the tool's definition Tool description states 'Detach a tag from a bookmark,' which modifies the metadata association of an existing bookmark by removing a tag relationship. This is a reversible write operation on bookmark metadata.
Documented attack patterns abuse exactly the kind of access detach-tag-from-bookmark gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Karakeep MCP server, and nothing reaches the server without passing your rules. This is the rule we recommend for detach-tag-from-bookmark:
{
"version": "1",
"default": "deny",
"tools": {
"detach-tag-from-bookmark": {
"limits": [
{
"counter": "detach-tag-from-bookmark_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}detach-tag-from-bookmark stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Detach a tag from a bookmark. It is categorised as a Write tool in the Karakeep MCP server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Karakeep MCP server MCP server in PolicyLayer and add a rule for detach-tag-from-bookmark: 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 Karakeep MCP server. Nothing to install.
detach-tag-from-bookmark is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the detach-tag-from-bookmark 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 detach-tag-from-bookmark. 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.
detach-tag-from-bookmark is provided by the Karakeep MCP server MCP server (karakeep-app/karakeep). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Karakeep MCP server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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11 Karakeep MCP server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.