alter_warehouse · Snowflake Developer MCP Server MCP

WHAT IT DOES

What alter_warehouse does on Snowflake Developer MCP Server

AI agents use alter_warehouse to create or update resources in Snowflake Developer MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Snowflake Developer MCP Server environment.

WHY IT NEEDS A POLICY

Why alter_warehouse needs a policy

This tool modifies warehouse configuration settings, which is a reversible write operation. While warehouse modifications can impact performance and costs (affecting multiple users and operations), they do not delete data or trigger irreversible destructive actions.

From the tool's definition Tool name 'alter_warehouse' and description 'Modify warehouse settings for performance optimization' indicate modification of existing infrastructure configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

alter_warehouse Rate-limited

alter_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "alter_warehouse": {
      "limits": [
        {
          "counter": "alter_warehouse_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Snowflake Developer MCP Server, so you can run agents against it safely.

FAQ

Questions about alter_warehouse

What does the alter_warehouse tool do? +

Modify warehouse settings for performance optimization. It is categorised as a Write tool in the Snowflake Developer MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on alter_warehouse? +

Register the Snowflake Developer MCP Server MCP server in PolicyLayer and add a rule for alter_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 Snowflake Developer MCP Server. Nothing to install.

What risk level is alter_warehouse? +

alter_warehouse is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit alter_warehouse? +

Yes. Add a rate_limit block to the alter_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.

How do I block alter_warehouse completely? +

Set action: deny in the PolicyLayer policy for alter_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.

What MCP server provides alter_warehouse? +

alter_warehouse is provided by the Snowflake Developer MCP Server MCP server (mcp-tg/snowflake-developer-kit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.