feishu_insert_diagram · Feishu MCP Server MCP: Risk & Policy

WHAT IT DOES

What feishu_insert_diagram does on Feishu MCP Server

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

WHY IT NEEDS A POLICY

Why feishu_insert_diagram needs a policy

This tool creates/inserts diagram content into Feishu documents, which is a reversible modification operation (diagrams can be edited or deleted). It does not execute arbitrary code or permanently delete data. While it modifies documents, the operation is not destructive and can be undone.

From the tool's definition Tool description explicitly states "插入 Mermaid 架构图" (insert Mermaid diagrams) into Feishu documents. This is a write operation that modifies document content. The server description confirms "write, and manage Feishu documents" capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

feishu_insert_diagram Rate-limited

feishu_insert_diagram 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_insert_diagram": {
      "limits": [
        {
          "counter": "feishu_insert_diagram_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 Feishu MCP Server, so you can run agents against it safely.

FAQ

Questions about feishu_insert_diagram

What does the feishu_insert_diagram tool do? +

在飞书文档中插入 Mermaid 架构图（使用飞书「文本绘图」功能）。支持 flowchart、sequenceDiagram、classDiagram、graph、mindmap、timeline 等类型。. It is categorised as a Write tool in the Feishu MCP Server 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_insert_diagram? +

Register the Feishu MCP Server MCP server in PolicyLayer and add a rule for feishu_insert_diagram: 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 MCP Server. Nothing to install.

What risk level is feishu_insert_diagram? +

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

Can I rate-limit feishu_insert_diagram? +

Yes. Add a rate_limit block to the feishu_insert_diagram 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_insert_diagram completely? +

Set action: deny in the PolicyLayer policy for feishu_insert_diagram. 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_insert_diagram? +

feishu_insert_diagram is provided by the Feishu MCP Server MCP server (redleaves/feishu-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.