Get table structure and column information
AI agents call mysql_describe_table to retrieve information from MySQL ReadOnly 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 and returns table structure/schema information without modifying data or executing arbitrary code. It is a safe introspection operation typical of read-only database access. The server's read-only enforcement and SQL injection protection further mitigate risk.
From the tool's definition Tool name 'mysql_describe_table' and description 'Get table structure and column information' indicate read-only retrieval of schema metadata. Server description explicitly states 'read-only access' with 'SQL injection protection'.
Attacks that exploit this kind of access
Get table structure and column information. It is categorised as a Read tool in the MySQL ReadOnly MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MySQL ReadOnly MCP 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 ReadOnly MCP 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 ReadOnly MCP Server MCP server (zhaojw-php/mysql-readonly-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.
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