List all SQL warehouses in the Databricks workspace.
AI agents call list_warehouses to retrieve information from Databricks MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about existing SQL warehouses without creating, modifying, deleting, or executing operations. It is a purely informational read operation with minimal risk—it only exposes metadata about warehouse configurations that already exist in the workspace. No side effects or irreversible actions occur.
From the tool's definition Tool name 'list_warehouses' and description 'List all SQL warehouses in the Databricks workspace' indicate a query/retrieval operation with no modification or deletion of data.
Documented attack patterns abuse exactly the kind of access list_warehouses gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Databricks MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_warehouses:
{
"version": "1",
"default": "deny",
"tools": {
"list_warehouses": {}
}
}list_warehouses 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 SQL warehouses in the Databricks workspace. It is categorised as a Read tool in the Databricks MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Databricks MCP Server MCP server in PolicyLayer and add a rule for list_warehouses: 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 Databricks MCP Server. Nothing to install.
list_warehouses 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_warehouses 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_warehouses. 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_warehouses is provided by the Databricks MCP Server MCP server (pulkitxchadha/awesome-databricks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Databricks MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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86 Databricks MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.