AI agents call search_users to retrieve information from Weibo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs information retrieval—searching Weibo users by keywords and returning results. This has no side effects, does not modify data, execute code, delete data, or involve financial transactions. It is a straightforward Read operation with minimal risk.
From the tool's definition Tool searches for and returns user lists based on keywords ("搜索微博用户并返回匹配的用户列表" = search Weibo users and return matched user list). This is a query/search operation with no data modification.
Documented attack patterns abuse exactly the kind of access search_users gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Weibo MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_users:
{
"version": "1",
"default": "deny",
"tools": {
"search_users": {}
}
}search_users is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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根据关键词搜索微博用户并返回匹配的用户列表. It is categorised as a Read tool in the Weibo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Weibo MCP Server MCP server in PolicyLayer and add a rule for search_users: 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 Weibo MCP Server. Nothing to install.
search_users 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 search_users 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 search_users. 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.
search_users is provided by the Weibo MCP Server MCP server (selenium39/mcp-server-weibo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 Weibo MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
5 Weibo MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.