AI agents call yfy_list_department_children 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.
The tool retrieves organizational hierarchy information (child departments) for discovery purposes. It performs a read-only query operation with no side effects, data modification, code execution, or deletion. The explicitly stated purpose is 'organization discovery, not file access,' confirming it is informational only. The blast radius of misuse is limited to exposure of organizational structure metadata.
From the tool's definition Tool name 'yfy_list_department_children' and description 'List child departments using the enterprise token. This is for organization discovery, not file access.' indicate a query/retrieval operation with no modification or destructive capability.
Attacks that exploit this kind of access
List child departments using the enterprise token. This is for organization discovery, not file access. 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_department_children: 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_department_children 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_department_children 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_department_children. 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_department_children 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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