update_number · Seven MCP: Risk & Policy

WHAT IT DOES

What update_number does on Seven

AI agents use update_number 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_number needs a policy

This tool modifies phone number settings (friendly name, forwarding) reversibly without deleting data or executing arbitrary code. It falls under Write category as a configuration update. Severity is medium because misconfiguration could disrupt communications or redirect calls/messages to unintended destinations, but the action is reversible and confined to a specific phone number's settings.

From the tool's definition Tool name 'update_number' and description 'Update phone number configuration including friendly name and forwarding settings' indicate modification of existing configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_number Rate-limited

update_number 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_number": {
      "limits": [
        {
          "counter": "update_number_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_number

What does the update_number tool do? +

Update phone number configuration including friendly name and forwarding settings. 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_number? +

Register the Seven MCP server in PolicyLayer and add a rule for update_number: 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_number? +

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

Can I rate-limit update_number? +

Yes. Add a rate_limit block to the update_number 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_number completely? +

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

update_number 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.