AI agents call treasury_share 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 and server context suggest this retrieves treasury share information—a standard governance disclosure. Without a description, confidence is moderate (0.6), but the naming pattern and absence of verbs indicating modification/deletion/execution supports Read classification. No evidence of side effects, financial transactions, or destructive operations.
From the tool's definition Tool name 'treasury_share' suggests retrieval of treasury share data; no description provided. Given the server's context (governance & AGM disclosures for Korean stocks), this appears to be a data-retrieval tool consistent with other tools on the server…
Documented attack patterns abuse exactly the kind of access treasury_share 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 treasury_share:
{
"version": "1",
"default": "deny",
"tools": {
"treasury_share": {}
}
}treasury_share is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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treasury_share. 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 treasury_share: 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.
treasury_share 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 treasury_share 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 treasury_share. 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.
treasury_share 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.