get_top_hidden_opportunities

THE RISK

Low Risk

Why get_top_hidden_opportunities needs a policy

This tool performs data retrieval only. It queries a results set or cache of analyzed grant opportunities and returns information to the user. There are no side effects, no data modification, no destructive actions, no code execution, and no financial transactions. The 'hidden' descriptor refers to opportunities that may not be obvious through standard search, but the operation itself remains a simple Read function.

From the tool's definition Tool retrieves and returns 'top hidden opportunities from recent analysis' — a read-only query operation that fetches pre-computed data without modification, deletion, or execution of external commands.

Documented attack patterns abuse exactly the kind of access get_top_hidden_opportunities gives an agent:

POLICY

How to control get_top_hidden_opportunities

PolicyLayer is an MCP gateway — it sits between your AI agents and Grants Search MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_top_hidden_opportunities:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_top_hidden_opportunities": {}
  }
}

get_top_hidden_opportunities is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Grants Search MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Grants Search MCP Server tools

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All 12 Grants Search MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_top_hidden_opportunities

What does the get_top_hidden_opportunities tool do? +

Get top hidden opportunities from recent analysis. It is categorised as a Read tool in the Grants Search MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_top_hidden_opportunities? +

Register the Grants Search MCP Server MCP server in PolicyLayer and add a rule for get_top_hidden_opportunities: 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 Grants Search MCP Server. Nothing to install.

What risk level is get_top_hidden_opportunities? +

get_top_hidden_opportunities is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_top_hidden_opportunities? +

Yes. Add a rate_limit block to the get_top_hidden_opportunities 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.

How do I block get_top_hidden_opportunities completely? +

Set action: deny in the PolicyLayer policy for get_top_hidden_opportunities. 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.

What MCP server provides get_top_hidden_opportunities? +

get_top_hidden_opportunities is provided by the Grants Search MCP Server MCP server (tar-ive/grants-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Grants Search MCP Server tool call.

Start from Grants Search MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →