wechat_send_to_multiple_friends · Wechat MCP: Risk & Policy

WHAT IT DOES

What wechat_send_to_multiple_friends does on Wechat

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

WHY IT NEEDS A POLICY

Why wechat_send_to_multiple_friends needs a policy

The tool sends messages to multiple WeChat friends, which creates new data (messages) but is reversible through deletion or editing. While it affects multiple recipients and could be misused for spam or unauthorized communication at scale, it is not Financial (no money involved), not Destructive (messages can be deleted), and not Execute (no arbitrary code execution).

From the tool's definition Tool description states '向多个微信好友发送单条或者多条消息' (send single or multiple messages to multiple WeChat friends). This is a Write operation that creates/sends messages to multiple recipients.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wechat_send_to_multiple_friends Rate-limited

wechat_send_to_multiple_friends 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": {
    "wechat_send_to_multiple_friends": {
      "limits": [
        {
          "counter": "wechat_send_to_multiple_friends_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 Wechat, so you can run agents against it safely.

FAQ

Questions about wechat_send_to_multiple_friends

What does the wechat_send_to_multiple_friends tool do? +

向多个微信好友发送单条或者多条消息. It is categorised as a Write tool in the Wechat MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wechat_send_to_multiple_friends? +

Register the Wechat MCP server in PolicyLayer and add a rule for wechat_send_to_multiple_friends: 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 Wechat. Nothing to install.

What risk level is wechat_send_to_multiple_friends? +

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

Can I rate-limit wechat_send_to_multiple_friends? +

Yes. Add a rate_limit block to the wechat_send_to_multiple_friends 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 wechat_send_to_multiple_friends completely? +

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

wechat_send_to_multiple_friends is provided by the Wechat MCP server (panxingfeng/mcp_server_wechat). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.