AI agents call yfy_list_personal_items to retrieve information from Yifangyun without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists directory contents from a user's personal space in the Yifangyun cloud drive. The operation is read-only with no side effects—it queries existing data without creating, modifying, deleting, or executing anything. Severity is low because listing personal files poses minimal risk even if misused by an AI agent, as it only exposes data that the authenticated user already has access to.
From the tool's definition Tool name 'yfy_list_personal_items' and description 'List first-level files and folders in a user' indicate a query/retrieval operation with no modification capability.
Attacks that exploit this kind of access
List first-level files and folders in a user. It is categorised as a Read tool in the Yifangyun MCP Server, which means it retrieves data without modifying state.
Register the Yifangyun MCP server in PolicyLayer and add a rule for yfy_list_personal_items: 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 Yifangyun. Nothing to install.
yfy_list_personal_items 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 yfy_list_personal_items 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 yfy_list_personal_items. 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.
yfy_list_personal_items is provided by the Yifangyun MCP server (mrhegit/yifangyun-mcp). 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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