iwencai_select_A_stock · FNewsCrawler MCP: Risk & Policy

WHAT IT DOES

What iwencai_select_A_stock does on FNewsCrawler

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

WHY IT NEEDS A POLICY

Why iwencai_select_A_stock needs a policy

An AI agent can call iwencai_select_A_stock faster than any human can review — one bad instruction and it creates or modifies resources in FNewsCrawler by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

iwencai_select_A_stock Rate-limited

iwencai_select_A_stock 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": {
    "iwencai_select_A_stock": {
      "limits": [
        {
          "counter": "iwencai_select_a_stock_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 FNewsCrawler, so you can run agents against it safely.

FAQ

Questions about iwencai_select_A_stock

What does the iwencai_select_A_stock tool do? +

iwencai_select_A_stock. It is categorised as a Write tool in the FNewsCrawler MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on iwencai_select_A_stock? +

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

What risk level is iwencai_select_A_stock? +

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

Can I rate-limit iwencai_select_A_stock? +

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

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

iwencai_select_A_stock is provided by the FNewsCrawler MCP server (noimank/fnewscrawler). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.