csql_restore · Storage MCP: Risk & Policy

WHAT IT DOES

What csql_restore does on Storage

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

WHY IT NEEDS A POLICY

Why csql_restore needs a policy

An AI agent can call csql_restore faster than any human can review — one bad instruction and it creates or modifies resources in Storage by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

csql_restore Rate-limited

csql_restore 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": {
    "csql_restore": {
      "limits": [
        {
          "counter": "csql_restore_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 Storage, so you can run agents against it safely.

FAQ

Questions about csql_restore

What does the csql_restore tool do? +

Restores a Cloud SQL backup to a Cloud SQL instance. It is categorised as a Write tool in the Storage MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on csql_restore? +

Register the Storage MCP server in PolicyLayer and add a rule for csql_restore: 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 Storage. Nothing to install.

What risk level is csql_restore? +

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

Can I rate-limit csql_restore? +

Yes. Add a rate_limit block to the csql_restore 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 csql_restore completely? +

Set action: deny in the PolicyLayer policy for csql_restore. 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 csql_restore? +

csql_restore is provided by the Storage MCP server (@google-cloud/storage-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.