Get comprehensive schema information including tables, relationships, constraints, and data patterns.
AI agents call mysql_schema 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.
This tool retrieves schema metadata (tables, relationships, constraints, data patterns) without executing queries against data, modifying structures, or triggering side effects. It is a read-only introspection operation.
From the tool's definition Tool name 'mysql_schema' and description 'Get comprehensive schema information including tables, relationships, constraints, and data patterns' indicate retrieval of metadata without modification.
Attacks that exploit this kind of access
Get comprehensive schema information including tables, relationships, constraints, and data patterns. 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 mysql_schema: 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.
mysql_schema 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_schema 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_schema. 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_schema is provided by the MySQL MCP Server MCP server (ttpears/mysql-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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