AI agents call get_field_acl 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 queries and retrieves access control information about fields within a Kintone application. It performs a read-only operation that returns metadata about permissions without modifying data, executing commands, or causing irreversible changes. The blast radius of misuse is limited to information disclosure of ACL settings.
From the tool's definition Tool name 'get_field_acl' and description 'kintoneアプリのフィールドのアクセス権限を取得します' (retrieves field access permissions for a Kintone app). The verb 'get/取得' indicates data retrieval with no modification or execution of operations.
Documented attack patterns abuse exactly the kind of access get_field_acl 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_field_acl:
{
"version": "1",
"default": "deny",
"tools": {
"get_field_acl": {}
}
}get_field_acl is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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kintoneアプリのフィールドのアクセス権限を取得します. 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_field_acl: 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_field_acl 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_field_acl 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_field_acl. 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_field_acl 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.
Free to start. No card required.
70 Kintone MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.