Search for public facilities in Seoul (restrooms, pharmacies, WiFi hotspots, AED locations, tourist info centers). Args: type: Type of facility — "toilet", "pharmacy", "wifi", "aed", or "tourist_info". district: Seoul district name in English or Korean (e.g., "gangnam", "jongno", "강남구", "종로구"). f...
Part of the Seoul Essentials server.
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AI agents call find_places to retrieve information from Seoul Essentials 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 find_places 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": {
"find_places": {}
}
}See the full Seoul Essentials policy for all 4 tools.
These attack patterns abuse exactly the kind of access find_places 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.
Search for public facilities in Seoul (restrooms, pharmacies, WiFi hotspots, AED locations, tourist info centers). Args: type: Type of facility — "toilet", "pharmacy", "wifi", "aed", or "tourist_info". district: Seoul district name in English or Korean (e.g., "gangnam", "jongno", "강남구", "종로구"). filters: Service-specific filters as key-value pairs. Examples: {"english": true} for pharmacies with English support, {"is_24h": true} for 24-hour restrooms, {"indoor": true} for indoor WiFi. limit: Maximum number of results to return (1-50, default 10). Returns: A list of matching places with location, services, and hours information.. It is categorised as a Read tool in the Seoul Essentials MCP Server, which means it retrieves data without modifying state.
Register the Seoul Essentials MCP server in PolicyLayer and add a rule for find_places: 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 Seoul Essentials. Nothing to install.
find_places 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 find_places 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 find_places. 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.
find_places is provided by the Seoul Essentials MCP server (do-droid/seoul-essentials). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 Seoul Essentials tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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