list-tables

THE RISK

Low Risk

Why list-tables needs a policy

This tool retrieves database table names and metadata through filtering/browsing operations. No data is modified, deleted, or executed. It is a read-only introspection operation with minimal blast radius—an AI could misuse it to discover sensitive schema details, but cannot alter or destroy data. Classified as Read with low severity.

From the tool's definition Tool name 'list-tables' and description 'Database metadata browsing with filtering options' indicate retrieval of schema/metadata information without modification or deletion.

Documented attack patterns abuse exactly the kind of access list-tables gives an agent:

POLICY

How to control list-tables

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Libsql, and nothing reaches the server without passing your rules. This is the rule we recommend for list-tables:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list-tables": {}
  }
}

list-tables is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Mcp Libsql — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Mcp Libsql tools

Destructive alter-table Table structure modifications (ADD/RENAME/DROP operations) Write create-table DDL operations for table creation with security measures Write write-query INSERT/UPDATE/DELETE operations with transaction support Read describe-table Table schema inspection with multiple output formats Read read-query Execute SELECT queries with comprehensive security validation

All 6 Mcp Libsql tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list-tables

What does the list-tables tool do? +

Database metadata browsing with filtering options. It is categorised as a Read tool in the Mcp Libsql MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list-tables? +

Register the Mcp Libsql 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 Libsql. Nothing to install.

What risk level is list-tables? +

list-tables is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list-tables? +

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.

How do I block list-tables completely? +

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.

What MCP server provides list-tables? +

list-tables is provided by the Mcp Libsql MCP server (xexr/mcp-libsql). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Libsql tool call.

Start from Mcp Libsql, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →