Get detailed schema information for a specific table including columns, types, and constraints
AI agents call describe_table to retrieve information from Enhanced MCP 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 read-only introspection of database/table schema. It retrieves structural information (columns, types, constraints) with no side effects. While schema information could theoretically inform a malicious actor about system structure, the tool itself has minimal blast radius as it only returns metadata—no data manipulation, code execution, or irreversible actions are possible.
From the tool's definition Tool name 'describe_table' and description 'Get detailed schema information for a specific table including columns, types, and constraints' indicate a retrieval operation that queries metadata without modifying, deleting, or executing code.
Attacks that exploit this kind of access
Get detailed schema information for a specific table including columns, types, and constraints. It is categorised as a Read tool in the Enhanced MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Enhanced MCP Server MCP server in PolicyLayer and add a rule for 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 Enhanced MCP Server. Nothing to install.
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 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 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.
describe_table is provided by the Enhanced MCP Server MCP server (pbulbule13/mcpwithgoogle). 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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