Reveal the answer for the current GeoGuessr game. ⚠️ ONLY call this tool when: - User explicitly says "I give up" - User says "tell me the answer" - User says "I surrender" or similar Do NOT call this if: - User is still guessing - User just asked for a hint - User said "I don't know" but hasn't ...
Part of the My MCP Server server.
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AI agents call reveal_answer to retrieve information from My MCP Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though reveal_answer only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"reveal_answer": {}
}
}See the full My MCP Server policy for all 4 tools.
These attack patterns abuse exactly the kind of access reveal_answer gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Reveal the answer for the current GeoGuessr game. ⚠️ ONLY call this tool when: - User explicitly says "I give up" - User says "tell me the answer" - User says "I surrender" or similar Do NOT call this if: - User is still guessing - User just asked for a hint - User said "I don't know" but hasn't given up. It is categorised as a Read tool in the My MCP Server MCP Server, which means it retrieves data without modifying state.
Register the My MCP Server MCP server in PolicyLayer and add a rule for reveal_answer: 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 My MCP Server. Nothing to install.
reveal_answer 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 reveal_answer 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 reveal_answer. 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.
reveal_answer is provided by the My MCP Server MCP server (https://gueguesser-chatgptap-68537aa2.alpic.live). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 My MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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