调试最后一个失败的命令，读取仪器错误队列。
AI agents call debug_last_error to retrieve information from Instrument 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 diagnostic information from a test instrument to help debug failed commands. Reading error logs and status information is a read-only operation with no side effects, making it a Read category tool. The severity is low because error queues contain only diagnostic data and cannot harm the instrument or its operations.
From the tool's definition The description states the tool 'reads' (reads the instrument error queue) from the device. The Chinese text '读取仪器错误队列' translates to 'read the instrument error queue.' This is a diagnostic/troubleshooting operation that retrieves error information without…
Attacks that exploit this kind of access
调试最后一个失败的命令，读取仪器错误队列。. It is categorised as a Read tool in the Instrument MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Instrument MCP Server MCP server in PolicyLayer and add a rule for debug_last_error: 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 Instrument MCP Server. Nothing to install.
debug_last_error 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 debug_last_error 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 debug_last_error. 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.
debug_last_error is provided by the Instrument MCP Server MCP server (zeng-andrew/instrument-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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