AI agents call get_random_note to retrieve information from Zk Utils without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries the zk note collection and returns a note without any side effects. It performs a non-destructive retrieval operation similar to other sibling tools (get_note_content, get_notes, etc.). There is no data modification, execution of external commands, or irreversible operations. The blast radius of misuse is minimal—an agent could only access existing notes randomly, posing minimal security risk.
From the tool's definition Tool name and description indicate a retrieval operation: 'Retrieve a randomly selected note from the zk collection.' The verb 'retrieve' and the read-only nature of the operation (no modification, creation, or deletion) classify this as a Read action.
Attacks that exploit this kind of access
Retrieve a randomly selected note from the zk collection. It is categorised as a Read tool in the Zk Utils MCP Server, which means it retrieves data without modifying state.
Register the Zk Utils MCP server in PolicyLayer and add a rule for get_random_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 Zk Utils. Nothing to install.
get_random_note 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 get_random_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 get_random_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.
get_random_note is provided by the Zk Utils MCP server (koei-kaji/zk-utils). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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