List tables in the current database, optionally filtered by schema.
AI agents call list_tables to retrieve information from Mcp Sqlserver without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata about database structure (table names and schemas). It performs no data modification, deletion, or code execution. The operation is read-only and returns informational results only, making it a straightforward Read operation with minimal security risk.
From the tool's definition Tool lists tables in a database with optional schema filtering. The server description explicitly states it 'enables executing read-only queries, listing tables, and describing database schemas' with no mention of write, delete, or execute capabilities.
Attacks that exploit this kind of access
List tables in the current database, optionally filtered by schema. It is categorised as a Read tool in the Mcp Sqlserver MCP Server, which means it retrieves data without modifying state.
Register the Mcp Sqlserver MCP server in PolicyLayer and add a rule for list_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 Mcp Sqlserver. Nothing to install.
list_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 list_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 list_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.
list_tables is provided by the Mcp Sqlserver MCP server (mlsloynaz/mcp-sql-server). 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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