AI agents call search_market to retrieve information from FishClaw MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a query operation on a marketplace to retrieve product information (titles, prices, links). It has no side effects—it does not create, modify, delete, or execute code. The purpose is market research and competitive analysis, which are inherently read operations.
From the tool's definition Tool description states it searches Xianyu marketplace for specified keywords and collects result lists (titles, prices, links) for competitor research and pricing reference.
Documented attack patterns abuse exactly the kind of access search_market gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and FishClaw MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for search_market:
{
"version": "1",
"default": "deny",
"tools": {
"search_market": {}
}
}search_market is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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在闲鱼搜索指定关键词，采集结果列表（标题、价格、链接），用于竞品调研和定价参考。. It is categorised as a Read tool in the FishClaw MCP MCP Server, which means it retrieves data without modifying state.
Register the FishClaw MCP server in PolicyLayer and add a rule for search_market: 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 FishClaw MCP. Nothing to install.
search_market 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_market 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_market. 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_market is provided by the FishClaw MCP server (tnoobt/fishclaw_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from FishClaw MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
12 FishClaw MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.