google_oauth_reauthenticate

THE RISK

Critical Risk

Why google_oauth_reauthenticate needs a policy

The tool explicitly deletes existing OAuth tokens before initiating a new authentication flow. Deleting authentication tokens is irreversible (the old tokens are gone and cannot be recovered), which qualifies as Destructive.

From the tool's definition Delete existing tokens and start fresh OAuth authentication flow

Documented attack patterns abuse exactly the kind of access google_oauth_reauthenticate gives an agent:

POLICY

How to control google_oauth_reauthenticate

PolicyLayer is an MCP gateway — it sits between your AI agents and Google MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for google_oauth_reauthenticate:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "google_oauth_reauthenticate"
  ]
}

google_oauth_reauthenticate disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Google MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Google MCP tools

Destructive google_calendar_delete_event Delete an event from Google Calendar Destructive google_drive_delete_file Delete a file from Google Drive Destructive google_gmail_delete_email Delete or trash an email Destructive google_tasks_delete_task Delete a task Destructive google_tasks_delete_tasklist Delete a task list Write google_calendar_create_event Create a new event in Google Calendar Write google_calendar_set_default Set the default calendar ID for operations Write google_calendar_update_event Update an existing event in Google Calendar

All 35 Google MCP tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Google MCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about google_oauth_reauthenticate

What does the google_oauth_reauthenticate tool do? +

Delete existing tokens and start fresh OAuth authentication flow. It is categorised as a Destructive tool in the Google MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on google_oauth_reauthenticate? +

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

What risk level is google_oauth_reauthenticate? +

google_oauth_reauthenticate is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit google_oauth_reauthenticate? +

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

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

google_oauth_reauthenticate is provided by the Google MCP server (vakharwalad23/google-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Google MCP tool call.

Start from Google MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →