List all available Trino catalogs.
AI agents call list_catalogs 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.
This tool performs a read-only operation that enumerates available catalogs in a Trino cluster. It retrieves metadata without creating, modifying, deleting, or executing any operations. The blast radius is minimal—an AI agent misusing this tool could at worst discover catalog names, which is non-sensitive metadata typically used for navigation.
From the tool's definition Tool name 'list_catalogs' and description 'List all available Trino catalogs' indicate a retrieval/query operation with no data modification or side effects.
Attacks that exploit this kind of access
List all available Trino catalogs. 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_catalogs: 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_catalogs 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_catalogs 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_catalogs. 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_catalogs 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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