Get field-level access permissions
AI agents call getFieldAcl to retrieve information from kintone OAuth MCP Server on Cloudflare Workers without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves (queries) field-level access control information, which is a read-only operation with no side effects. It does not create, modify, delete, or execute operations. The blast radius if misused is minimal—an agent could only enumerate permissions, not escalate them or access restricted data.
From the tool's definition Tool name 'getFieldAcl' and description 'Get field-level access permissions' indicate retrieval of access control metadata without modification or execution of external operations.
Attacks that exploit this kind of access
Get field-level access permissions. It is categorised as a Read tool in the kintone OAuth MCP Server on Cloudflare Workers MCP Server, which means it retrieves data without modifying state.
Register the kintone OAuth MCP Server on Cloudflare Workers MCP server in PolicyLayer and add a rule for getFieldAcl: 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 OAuth MCP Server on Cloudflare Workers. Nothing to install.
getFieldAcl 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 getFieldAcl 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 getFieldAcl. 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.
getFieldAcl is provided by the kintone OAuth MCP Server on Cloudflare Workers MCP server (r3-yamauchi/kintone-oauth-mcp-server-cfw). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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