获取SQL查询的执行计划，用于分析查询性能
AI agents call explain_query to retrieve information from MySQL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool provides performance analysis of SQL queries by explaining their execution plans. This is purely informational—it reads metadata about query execution without side effects on data. It does not execute the query itself, create/modify data, or perform destructive operations.
From the tool's definition Tool description states it retrieves SQL query execution plans for analysis purposes. 'explain' / execution plan retrieval is a non-destructive, read-only operation that queries metadata about how a query would execute, without modifying data or executing the…
Attacks that exploit this kind of access
获取SQL查询的执行计划，用于分析查询性能. It is categorised as a Read tool in the MySQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MySQL MCP Server MCP server in PolicyLayer and add a rule for explain_query: 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 MySQL MCP Server. Nothing to install.
explain_query 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 explain_query 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 explain_query. 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.
explain_query is provided by the MySQL MCP Server MCP server (lm203688/mysql-mcp-server). 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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