AI agents use create_sql_warehouse to create or update resources in Databricks MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Databricks MCP Server environment.
Creating a SQL warehouse is a reversible write operation (warehouses can be deleted). It results in resource provisioning and ongoing costs, but the action itself can be undone by deletion. This is not Destructive (reversible), not Execute (not running arbitrary code/commands), and not Financial (doesn't directly move money, though it may incur costs).
From the tool's definition Tool name 'create_sql_warehouse' and description 'Create a new SQL warehouse' indicate irreversible creation of infrastructure/resources. This is a write operation that creates new persistent objects in Databricks.
Documented attack patterns abuse exactly the kind of access create_sql_warehouse 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 create_sql_warehouse:
{
"version": "1",
"default": "deny",
"tools": {
"create_sql_warehouse": {
"limits": [
{
"counter": "create_sql_warehouse_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_sql_warehouse stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Create a new SQL warehouse. It is categorised as a Write tool in the Databricks MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Databricks MCP Server MCP server in PolicyLayer and add a rule for create_sql_warehouse: 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.
create_sql_warehouse is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_sql_warehouse 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 create_sql_warehouse. 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.
create_sql_warehouse 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.