AI agents call get_category_details to retrieve information from Hong Kong Open Data 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 or queries categorical metadata from the Hong Kong open data portal with no side effects. No write, delete, execute, or financial operations are possible. The empty description and naming pattern consistent with other read operations on this server indicate a simple data retrieval function. Severity is low because accessing public government data poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'get_category_details' and server description indicating it retrieves information about Hong Kong government open data categories.
Documented attack patterns abuse exactly the kind of access get_category_details gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Hong Kong Open Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_category_details:
{
"version": "1",
"default": "deny",
"tools": {
"get_category_details": {}
}
}get_category_details is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_category_details. It is categorised as a Read tool in the Hong Kong Open Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Hong Kong Open Data MCP Server MCP server in PolicyLayer and add a rule for get_category_details: 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 Hong Kong Open Data MCP Server. Nothing to install.
get_category_details 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_category_details 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_category_details. 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_category_details is provided by the Hong Kong Open Data MCP Server MCP server (mcp-open-data-hk/mcp-open-data-hk). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Hong Kong Open Data MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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8 Hong Kong Open Data MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.