Get the structure/schema of a specific table
AI agents call mysql_describe_table to retrieve information from MySQL Database 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 descriptive query (DESCRIBE/SHOW COLUMNS equivalent) that returns metadata about table structure. It does not execute arbitrary queries, modify data, delete anything, or trigger external operations. The severity is low because schema information is typically non-sensitive or already known to legitimate database users, and the operation has no side effects.
From the tool's definition Tool returns table structure/schema via 'Get the structure/schema of a specific table' - a retrieval operation with no modification or execution of code.
Attacks that exploit this kind of access
Get the structure/schema of a specific table. It is categorised as a Read tool in the MySQL Database Server MCP Server, which means it retrieves data without modifying state.
Register the MySQL Database Server MCP server in PolicyLayer and add a rule for mysql_describe_table: 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 Database Server. Nothing to install.
mysql_describe_table 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 mysql_describe_table 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 mysql_describe_table. 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.
mysql_describe_table is provided by the MySQL Database Server MCP server (thebusted/mcp-mysql-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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