Get database schema information including tables, columns, and relationships
AI agents call get_schema to retrieve information from SQL Server 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 structural metadata about the database (tables, columns, relationships) without executing queries, modifying data, or triggering side effects. It is a pure read operation that presents no risk of data loss, corruption, or unauthorized state changes.
From the tool's definition Tool name 'get_schema' and description 'Get database schema information including tables, columns, and relationships' clearly indicate data retrieval with no modification capabilities.
Attacks that exploit this kind of access
Get database schema information including tables, columns, and relationships. It is categorised as a Read tool in the SQL Server MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SQL Server MCP Server MCP server in PolicyLayer and add a rule for get_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 SQL Server MCP Server. Nothing to install.
get_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 get_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 get_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.
get_schema is provided by the SQL Server MCP Server MCP server (nebhg/sql-server-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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