AI agents call list_tables to retrieve information from Mssql without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple schema enumeration query that returns metadata about database tables. It is purely informational with no capability to modify, delete, or execute operations. The blast radius of misuse is minimal—an agent listing tables cannot cause data loss or unauthorized modifications.
From the tool's definition Tool name 'list_tables' and description 'Lists all tables in the database' indicate a retrieval operation with no side effects. No data is modified, deleted, or executed.
Attacks that exploit this kind of access
Lists all tables in the database. It is categorised as a Read tool in the Mssql MCP Server, which means it retrieves data without modifying state.
Register the Mssql 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 Mssql. 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 Mssql MCP server (terraco89/mcp-server-mssql). 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 →