获取 coremail 用户 user_at_domain 的指定属性（默认为姓名，统一身份认证用户名，用户状态）信息
AI agents call getAttrs to retrieve information from MCP-YNU FastMCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves user information attributes without modifying, executing code, deleting data, or triggering financial operations. It is a straightforward data retrieval operation with minimal blast radius if misused—an attacker could enumerate user details but cannot alter systems or cause irreversible harm through this tool alone.
From the tool's definition Tool name 'getAttrs' and description indicate it retrieves user attributes from coremail system. The Chinese description translates to 'Get specified attributes of coremail user user_at_domain (default: name, unified authentication username, user status)…
Attacks that exploit this kind of access
获取 coremail 用户 user_at_domain 的指定属性（默认为姓名，统一身份认证用户名，用户状态）信息. It is categorised as a Read tool in the MCP-YNU FastMCP Server MCP Server, which means it retrieves data without modifying state.
Register the MCP-YNU FastMCP Server MCP server in PolicyLayer and add a rule for getAttrs: 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 MCP-YNU FastMCP Server. Nothing to install.
getAttrs 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 getAttrs 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 getAttrs. 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.
getAttrs is provided by the MCP-YNU FastMCP Server MCP server (ynu/mcp-ynu). 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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