Search for tables and columns by name or pattern
AI agents call search_tables 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 metadata about database structure (tables and columns matching a pattern). It has no side effects—it only returns information about what exists in the schema. This is a classic Read operation. Severity is low because misuse would only expose schema information, not compromise data integrity or enable destructive actions directly.
From the tool's definition Tool name 'search_tables' and description 'Search for tables and columns by name or pattern' indicate schema discovery and querying operations without data modification or deletion.
Attacks that exploit this kind of access
Search for tables and columns by name or pattern. 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 search_tables: 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.
search_tables 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 search_tables 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 search_tables. 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.
search_tables 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.
Teams ship this data inside their own products. See what a licence covers →