Show column names, types, and constraints for a database table.
AI agents call db_describe_table to retrieve information from Overlord 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 database metadata (column names, types, constraints) without accessing or altering actual data. It is a read-only introspection operation typical of database administration utilities. The low severity reflects minimal blast radius—schema information alone cannot directly compromise systems, though it could inform further attacks if misused by an agent with malicious intent.
From the tool's definition Tool name 'db_describe_table' and description 'Show column names, types, and constraints for a database table' indicate schema inspection only. No data retrieval, modification, or deletion occurs.
Attacks that exploit this kind of access
Show column names, types, and constraints for a database table. It is categorised as a Read tool in the Overlord MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Overlord MCP Server MCP server in PolicyLayer and add a rule for db_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 Overlord MCP Server. Nothing to install.
db_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 db_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 db_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.
db_describe_table is provided by the Overlord MCP Server MCP server (skeeminator/overlord-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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