update_subaccount · Seven MCP: Risk & Policy

WHAT IT DOES

What update_subaccount does on Seven

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

WHY IT NEEDS A POLICY

Why update_subaccount needs a policy

This tool modifies subaccount settings reversibly rather than destroying them, placing it in Write category. However, the modification concerns automatic balance transfer configuration, which has financial implications (movement of account credits/funds). Severity is high because misconfiguration could result in unintended fund transfers or loss of financial control.

From the tool's definition Tool name 'update_subaccount' with description 'Configure automatic balance transfer for a subaccount' performs modification of subaccount configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_subaccount Rate-limited

update_subaccount 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": {
    "update_subaccount": {
      "limits": [
        {
          "counter": "update_subaccount_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 Seven, so you can run agents against it safely.

FAQ

Questions about update_subaccount

What does the update_subaccount tool do? +

Configure automatic balance transfer for a subaccount. It is categorised as a Write tool in the Seven MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_subaccount? +

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

What risk level is update_subaccount? +

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

Can I rate-limit update_subaccount? +

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

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

update_subaccount is provided by the Seven MCP server (seven-io/seven-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.