List configured vaults with their status (note count, last indexed run).
AI agents call list_vaults to retrieve information from Vault Memory without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and displays information about configured vaults and their metadata (note count, last indexed run). It performs no writes, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an agent could only enumerate vaults, which is a passive information disclosure risk at most.
From the tool's definition Tool name is 'list_vaults' and description states it 'List configured vaults with their status' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List configured vaults with their status (note count, last indexed run). It is categorised as a Read tool in the Vault Memory MCP Server, which means it retrieves data without modifying state.
Register the Vault Memory MCP server in PolicyLayer and add a rule for list_vaults: 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 Vault Memory. Nothing to install.
list_vaults 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 list_vaults 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 list_vaults. 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.
list_vaults is provided by the Vault Memory MCP server (owrede/vault-memory). 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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