检查按键是否被占用
AI agents call check_bind to retrieve information from DDNet MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation—it checks or retrieves whether a key binding is in use but does not create, modify, or delete any bindings. It has no side effects and poses minimal risk if misused by an AI agent.
From the tool's definition Tool name 'check_bind' and description '检查按键是否被占用' (check if a key binding is occupied) indicates a query operation that retrieves the status of key bindings without modifying them.
Attacks that exploit this kind of access
检查按键是否被占用. It is categorised as a Read tool in the DDNet MCP Server MCP Server, which means it retrieves data without modifying state.
Register the DDNet MCP Server MCP server in PolicyLayer and add a rule for check_bind: 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 DDNet MCP Server. Nothing to install.
check_bind 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_bind 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_bind. 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_bind is provided by the DDNet MCP Server MCP server (silverhi/ddnet-mcpserver). 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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