Get institutional holders (13F filers) for a company. Returns institutions that hold
AI agents call get_institutions to retrieve information from Signal8 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing public SEC filing data about institutional shareholdings. It performs a data retrieval operation with no side effects, no code execution, no data modification, and no financial transactions. The data returned are public institutional holdings already disclosed in SEC Form 13F filings. This is a straightforward Read operation with minimal risk of agent misuse.
From the tool's definition Tool name 'get_institutions' and description 'Get institutional holders (13F filers) for a company. Returns institutions that hold' indicate retrieval of publicly-filed SEC data with no modification or execution capability.
Attacks that exploit this kind of access
Get institutional holders (13F filers) for a company. Returns institutions that hold. It is categorised as a Read tool in the Signal8 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Signal8 MCP Server MCP server in PolicyLayer and add a rule for get_institutions: 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 Signal8 MCP Server. Nothing to install.
get_institutions 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_institutions 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_institutions. 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_institutions is provided by the Signal8 MCP Server MCP server (signal8ai/signal8-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.
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