AI agents call proxy_search to retrieve information from Open Proxy without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name indicates a search/query operation typical of Read category tools. The server's purpose is providing 'easy access' to disclosure data, and all sibling tools are clearly read-only data retrieval functions. Without a description, confidence is moderate, but the naming pattern and server context strongly suggest this is a search query tool with no side effects.
From the tool's definition Tool name 'proxy_search' suggests a search operation. No description provided. All sibling tools are data retrieval functions (agm_agenda_xml, agm_financials_xml, agm_items, etc.) that fetch governance disclosures without modifying data.
Documented attack patterns abuse exactly the kind of access proxy_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open Proxy, and nothing reaches the server without passing your rules. This is the rule we recommend for proxy_search:
{
"version": "1",
"default": "deny",
"tools": {
"proxy_search": {}
}
}proxy_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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proxy_search. It is categorised as a Read tool in the Open Proxy MCP Server, which means it retrieves data without modifying state.
Register the Open Proxy MCP server in PolicyLayer and add a rule for proxy_search: 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 Open Proxy. Nothing to install.
proxy_search 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 proxy_search 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 proxy_search. 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.
proxy_search is provided by the Open Proxy MCP server (marcoyou/open-proxy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Open Proxy, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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54 Open Proxy tools catalogued and risk-classified — across an index of 43,000+ MCP servers.