list_tables
AI agents call list_tables to retrieve information from Trino MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to list or enumerate table metadata without modifying any data. No description is provided, which reduces confidence slightly, but the name, context of sibling tools (describe_table, get_table_stats, list_catalogs, list_schemas), and standard SQL semantics all indicate this is a metadata retrieval operation with no side effects.
From the tool's definition Tool name 'list_tables' indicates a query operation that retrieves metadata about tables. The server description mentions 'read/write operations' as capabilities, and among sibling tools, 'list_catalogs' and 'list_schemas' are clearly Read operations;…
Attacks that exploit this kind of access
list_tables. It is categorised as a Read tool in the Trino MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Trino MCP Server 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 Trino MCP Server. 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 Trino MCP Server MCP server (weijie-tan3/trino-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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