AI agents call div_history 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.
No description provided, but contextual evidence from server purpose (investor data access) and sibling tools (all appear to be disclosure retrieval tools) indicates this is a data retrieval function with no side effects. Dividend history queries are typically read-only lookups. Low severity because it only accesses historical financial data without modification or execution capabilities.
From the tool's definition Tool name 'div_history' and server context (provides 'easy access to agm & governance related disclosures') suggest this retrieves dividend history data.
Documented attack patterns abuse exactly the kind of access div_history 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 div_history:
{
"version": "1",
"default": "deny",
"tools": {
"div_history": {}
}
}div_history is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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div_history. 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 div_history: 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.
div_history 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 div_history 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 div_history. 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.
div_history 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.