AI agents call finance.thirteen-f to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves institutional holding information from SEC filings. Form 13F-HR is public disclosure data. The tool performs a read-only lookup by CIK identifier and returns structured data. There are no side effects, data modifications, financial transactions, code execution, or destructive operations.
From the tool's definition Tool description states 'Parsed institutional holdings (Form 13F-HR)' and 'Returns each holding' — purely retrieves and queries publicly available SEC Form 13F data with no modification, deletion, or execution of commands.
Attacks that exploit this kind of access
Parsed institutional holdings (Form 13F-HR) for an investment manager by CIK. Returns each holding. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for finance.thirteen-f: 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 Mcp. Nothing to install.
finance.thirteen-f 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 finance.thirteen-f 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 finance.thirteen-f. 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.
finance.thirteen-f is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →