Create a new atomic Zettelkasten note with a unique ID, content, and optional tags.
AI agents use zk_create_note to create or update resources in Zettelkasten — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zettelkasten environment.
This tool creates new notes in a knowledge management system. Creation is reversible (notes can be deleted via zk_delete_note), so it is Write rather than Destructive. The severity is medium because uncontrolled note creation could spam the knowledge base or pollute the index, but the impact is containable and reversible. Confidence is high as the intent is unambiguous from the name and description.
From the tool's definition Tool name 'zk_create_note' and description 'Create a new atomic Zettelkasten note with a unique ID, content, and optional tags' explicitly indicates creation of new data.
Documented attack patterns abuse exactly the kind of access zk_create_note gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Zettelkasten, and nothing reaches the server without passing your rules. This is the rule we recommend for zk_create_note:
{
"version": "1",
"default": "deny",
"tools": {
"zk_create_note": {
"limits": [
{
"counter": "zk_create_note_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}zk_create_note 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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Create a new atomic Zettelkasten note with a unique ID, content, and optional tags. It is categorised as a Write tool in the Zettelkasten MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Zettelkasten MCP server in PolicyLayer and add a rule for zk_create_note: 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 Zettelkasten. Nothing to install.
zk_create_note 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 zk_create_note 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 zk_create_note. 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.
zk_create_note is provided by the Zettelkasten MCP server (liam-deacon/zettelkasten-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Zettelkasten, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
14 Zettelkasten tools catalogued and risk-classified — across an index of 43,000+ MCP servers.