AI agents call vault_stats_tool to retrieve information from Alaya without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs read-only operations that aggregate and display information about the vault structure and contents. No data is created, modified, deleted, or executed. The blast radius of misuse is minimal—an agent could only obtain statistical summaries of the knowledge vault that do not affect its integrity or contents.
From the tool's definition Tool returns vault statistics: note counts by directory, top tags, and index coverage. It retrieves and queries metadata about the vault without modifying or deleting any data.
Attacks that exploit this kind of access
Return vault statistics: note counts by directory, top tags, and index coverage. It is categorised as a Read tool in the Alaya MCP Server, which means it retrieves data without modifying state.
Register the Alaya MCP server in PolicyLayer and add a rule for vault_stats_tool: 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 Alaya. Nothing to install.
vault_stats_tool 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 vault_stats_tool 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 vault_stats_tool. 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.
vault_stats_tool is provided by the Alaya MCP server (luke-kucing/alaya). 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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