AI agents call feishu_doc_list to retrieve information from Feishu without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates documents within a folder—a read-only query operation with no side effects. Even if an AI agent misuses it, the worst outcome is information disclosure of already-accessible documents, which poses minimal risk. It clearly falls under the 'Read' category.
From the tool's definition Tool name 'feishu_doc_list' and description '列出飞书云空间指定文件夹下的文件' (list files in specified folder in Feishu cloud storage) indicate a listing/retrieval operation with no modifications.
Attacks that exploit this kind of access
列出飞书云空间指定文件夹下的文件. It is categorised as a Read tool in the Feishu MCP Server, which means it retrieves data without modifying state.
Register the Feishu MCP server in PolicyLayer and add a rule for feishu_doc_list: 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 Feishu. Nothing to install.
feishu_doc_list 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 feishu_doc_list 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 feishu_doc_list. 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.
feishu_doc_list is provided by the Feishu MCP server (zlplzp123wyt/feishu-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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