微信公众号黑名单管理工具。查看黑名单列表、拉黑/取消拉黑用户。被拉黑的用户无法收到公众号消息。
AI agents use wechat_blacklist to create or update resources in WeChat Official Account MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your WeChat Official Account MCP environment.
This tool creates and modifies access control lists by adding or removing users from a blacklist. While reversible (users can be un-blacklisted), it significantly impacts user experience by preventing message delivery. It does not permanently delete data or execute arbitrary code, so it is Write rather than Destructive or Execute.
From the tool's definition Tool description states '拉黑/取消拉黑用户' (blacklist/unblacklist users), which modifies user access permissions. This reversibly blocks or restores a user's ability to receive messages from the WeChat Official Account.
Documented attack patterns abuse exactly the kind of access wechat_blacklist gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and WeChat Official Account MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for wechat_blacklist:
{
"version": "1",
"default": "deny",
"tools": {
"wechat_blacklist": {
"limits": [
{
"counter": "wechat_blacklist_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}wechat_blacklist 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.
Free to start. No card required.
微信公众号黑名单管理工具。查看黑名单列表、拉黑/取消拉黑用户。被拉黑的用户无法收到公众号消息。. It is categorised as a Write tool in the WeChat Official Account MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the WeChat Official Account MCP server in PolicyLayer and add a rule for wechat_blacklist: 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 Official Account MCP. Nothing to install.
wechat_blacklist is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the wechat_blacklist 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 wechat_blacklist. 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.
wechat_blacklist is provided by the WeChat Official Account MCP server (xwang152-jack/wechat-official-account-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 WeChat Official Account MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
21 WeChat Official Account MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.