AI agents call vault_graph_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 queries and analyzes the existing graph structure of the knowledge vault to identify relationships and structural patterns. It retrieves metadata about note connections without creating, modifying, or deleting any content. The operations (returning graph data, finding orphans, identifying hubs) are all read-only analytical operations with no side effects.
From the tool's definition Tool description states 'Return the vault's wikilink graph as JSON' and 'Finds orphan notes and hub topics' — purely retrieval operations with no modification or deletion of data.
Attacks that exploit this kind of access
Return the vault's wikilink graph as JSON. Finds orphan notes and hub topics. 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_graph_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_graph_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_graph_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_graph_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_graph_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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