List all accessible Snowflake databases with optional filtering
AI agents call list-databases to retrieve information from Simple Snowflake MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about available databases with optional filtering. It is a read-only operation that queries information without creating, modifying, deleting, or executing any code. The blast radius is minimal—an agent listing databases gains visibility into the data warehouse structure but cannot alter state or access sensitive data through this tool alone.
From the tool's definition Tool name and description indicate a list/query operation: 'List all accessible Snowflake databases' returns data without modification or side effects.
Documented attack patterns abuse exactly the kind of access list-databases gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Simple Snowflake MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list-databases:
{
"version": "1",
"default": "deny",
"tools": {
"list-databases": {}
}
}list-databases is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all accessible Snowflake databases with optional filtering. It is categorised as a Read tool in the Simple Snowflake MCP MCP Server, which means it retrieves data without modifying state.
Register the Simple Snowflake MCP server in PolicyLayer and add a rule for list-databases: 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 Simple Snowflake MCP. Nothing to install.
list-databases 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-databases 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-databases. 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-databases is provided by the Simple Snowflake MCP server (yannbrrd/simple_snowflake_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Simple Snowflake MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
8 Simple Snowflake MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.