Get detailed information about a schema including table count, view count, and routine count (PostgreSQL/MSSQL)
AI agents call schema_info to retrieve information from Database MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
schema_info queries database schema structure and counts without creating, modifying, deleting, or executing any operations. It is purely informational retrieval of metadata about database objects. The blast radius of misuse is minimal—an agent learning schema details does not enable data modification, deletion, or code execution. Classified as Read with low severity and high confidence.
From the tool's definition Tool retrieves schema metadata (table count, view count, routine count) with no modification capability. Description explicitly indicates 'Get detailed information' which is a read-only operation.
Attacks that exploit this kind of access
Get detailed information about a schema including table count, view count, and routine count (PostgreSQL/MSSQL). It is categorised as a Read tool in the Database MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Database MCP Server MCP server in PolicyLayer and add a rule for schema_info: 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 Database MCP Server. Nothing to install.
schema_info 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 schema_info 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 schema_info. 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.
schema_info is provided by the Database MCP Server MCP server (zeaozhang/database-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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