Retrieve a complete list of all tags used across the Zettelkasten.
AI agents call zk_get_all_tags to retrieve information from Zettelkasten without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation that queries and returns tag metadata without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an agent could only access tag information that already exists. No data is at risk of modification or deletion.
From the tool's definition Tool retrieves a complete list of all tags used across the Zettelkasten; the verb 'Retrieve' and lack of any modification, deletion, or execution language indicates a read-only query operation with no side effects.
Documented attack patterns abuse exactly the kind of access zk_get_all_tags 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_get_all_tags:
{
"version": "1",
"default": "deny",
"tools": {
"zk_get_all_tags": {}
}
}zk_get_all_tags is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve a complete list of all tags used across the Zettelkasten. It is categorised as a Read tool in the Zettelkasten MCP Server, which means it retrieves data without modifying state.
Register the Zettelkasten MCP server in PolicyLayer and add a rule for zk_get_all_tags: 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_get_all_tags is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the zk_get_all_tags 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_get_all_tags. 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_get_all_tags 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.