feishu_doc_update · Lark Cli MCP: Risk & Policy

WHAT IT DOES

What feishu_doc_update does on Lark Cli

AI agents use feishu_doc_update to create or update resources in Lark Cli — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Lark Cli environment.

WHY IT NEEDS A POLICY

Why feishu_doc_update needs a policy

This tool creates or modifies data reversibly by updating document content. It is Write rather than Execute because it modifies specific document data rather than running arbitrary code. Severity is high because unauthorized document modifications could affect business-critical information, though the changes are theoretically reversible.

From the tool's definition Tool name 'feishu_doc_update' and description '更新一篇飞书文档内容' (update a Feishu document's content) explicitly indicate modification of document data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

feishu_doc_update Rate-limited

feishu_doc_update stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "feishu_doc_update": {
      "limits": [
        {
          "counter": "feishu_doc_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Lark Cli, so you can run agents against it safely.

FAQ

Questions about feishu_doc_update

What does the feishu_doc_update tool do? +

更新一篇飞书文档内容. It is categorised as a Write tool in the Lark Cli MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on feishu_doc_update? +

Register the Lark Cli MCP server in PolicyLayer and add a rule for feishu_doc_update: 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 Lark Cli. Nothing to install.

What risk level is feishu_doc_update? +

feishu_doc_update is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit feishu_doc_update? +

Yes. Add a rate_limit block to the feishu_doc_update 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.

How do I block feishu_doc_update completely? +

Set action: deny in the PolicyLayer policy for feishu_doc_update. 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.

What MCP server provides feishu_doc_update? +

feishu_doc_update is provided by the Lark Cli MCP server (yoreland/lark-cli-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.