Two market-wide institution leaderboards in one call: topByAum (largest holders by
AI agents call get_institutions_leaderboards 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 financial intelligence about institutional investor rankings—a passive, non-mutating query operation. While it provides competitive market intelligence useful for financial research, it does not create, modify, delete, execute code, or move money.
From the tool's definition Tool name 'get_institutions_leaderboards' and description indicate retrieval of market-wide leaderboard data about institutional investors ranked by AUM (assets under management).
Attacks that exploit this kind of access
Two market-wide institution leaderboards in one call: topByAum (largest holders by. 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_leaderboards: 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_leaderboards 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_leaderboards 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_leaderboards. 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_leaderboards 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.
Teams ship this data inside their own products. See what a licence covers →