AI agents call get_app_plugins to retrieve information from Kintone 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 metadata about plugins configured on a Kintone app. It performs a query operation with no ability to modify data, execute code, delete records, or incur financial obligations. The blast radius of misuse is minimal—an adversary could only learn about the app's plugin configuration, which is informational. This is a clear Read operation.
From the tool's definition Tool name and description (in Japanese) indicate retrieval of a list: 'get_app_plugins' and '取得します' (retrieves/obtains). The action is to fetch an existing list of plugins added to a Kintone app with no modification or side effects.
Documented attack patterns abuse exactly the kind of access get_app_plugins gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Kintone MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_app_plugins:
{
"version": "1",
"default": "deny",
"tools": {
"get_app_plugins": {}
}
}get_app_plugins is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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kintoneアプリに追加されているプラグインの一覧を取得します. It is categorised as a Read tool in the Kintone MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Kintone MCP Server MCP server in PolicyLayer and add a rule for get_app_plugins: 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 Kintone MCP Server. Nothing to install.
get_app_plugins 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_app_plugins 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_app_plugins. 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_app_plugins is provided by the Kintone MCP Server MCP server (r3-yamauchi/kintone-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Kintone 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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70 Kintone MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.