AI agents call check_connection to retrieve information from Nutstore without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool merely verifies connectivity to the WebDAV service and returns status information. It has no side effects on data, does not execute code or commands, and does not create, modify, or delete resources. It is a diagnostic read-only operation with minimal blast radius if misused.
From the tool's definition Tool name 'check_connection' and description '检查与坚果云 WebDAV 的连接状态' (Check connection status with Nutstore WebDAV) indicate a status check operation with no data retrieval, modification, deletion, or execution of external commands.
Attacks that exploit this kind of access
检查与坚果云 WebDAV 的连接状态. It is categorised as a Read tool in the Nutstore MCP Server, which means it retrieves data without modifying state.
Register the Nutstore MCP server in PolicyLayer and add a rule for check_connection: 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 Nutstore. Nothing to install.
check_connection 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 check_connection 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 check_connection. 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.
check_connection is provided by the Nutstore MCP server (silverze/nutstore-mcp). 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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