Retrieve major holders information including institutional ownership, fund holders, insider transactions, and direct holders.
AI agents call get_major_holders to retrieve information from Yfnhanced without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves publicly available or semi-public financial data about stock ownership and insider holdings. It has no side effects, does not modify data, execute code, delete records, or move money. The blast radius of misuse is minimal—at worst, an agent could query this repeatedly, but the data returned is read-only. Classification as Read is appropriate.
From the tool's definition Tool name 'get_major_holders' and description 'Retrieve major holders information' indicate a data retrieval operation with no modification, deletion, or execution of external operations.
Documented attack patterns abuse exactly the kind of access get_major_holders gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Yfnhanced, and nothing reaches the server without passing your rules. This is the rule we recommend for get_major_holders:
{
"version": "1",
"default": "deny",
"tools": {
"get_major_holders": {}
}
}get_major_holders is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve major holders information including institutional ownership, fund holders, insider transactions, and direct holders. It is categorised as a Read tool in the Yfnhanced MCP Server, which means it retrieves data without modifying state.
Register the Yfnhanced MCP server in PolicyLayer and add a rule for get_major_holders: 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 Yfnhanced. Nothing to install.
get_major_holders 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 get_major_holders 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 get_major_holders. 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.
get_major_holders is provided by the Yfnhanced MCP server (kanishka-namdeo/yfnhanced-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Yfnhanced, 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.
18 Yfnhanced tools catalogued and risk-classified — across an index of 43,000+ MCP servers.