uber_get_auth_url

THE RISK

Low Risk

Why uber_get_auth_url needs a policy

This tool only retrieves an authorization URL for authentication purposes. It does not execute code, modify data, delete data, or commit financial obligations. The most severe capability would be if a misused URL could be used for phishing, but the tool itself performs no dangerous action. Classification as Read with low severity is appropriate.

From the tool's definition Tool description states 'Get the Uber authorization URL for user to authenticate' — it retrieves a URL without side effects. This is a read-only query operation that returns an authentication endpoint.

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

POLICY

How to control uber_get_auth_url

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "uber_get_auth_url": {}
  }
}

uber_get_auth_url is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Uber Server tools

Financial uber_request_ride Request an Uber ride Destructive uber_cancel_ride Cancel an ongoing ride request Write uber_set_access_token Set the access token for a user after OAuth callback Read uber_get_price_estimates Get price estimates for a ride between two locations Read uber_get_ride_status Get the current status of a ride request

All 6 MCP Uber Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about uber_get_auth_url

What does the uber_get_auth_url tool do? +

Get the Uber authorization URL for user to authenticate. It is categorised as a Read tool in the MCP Uber Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on uber_get_auth_url? +

Register the MCP Uber Server MCP server in PolicyLayer and add a rule for uber_get_auth_url: 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 MCP Uber Server. Nothing to install.

What risk level is uber_get_auth_url? +

uber_get_auth_url is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit uber_get_auth_url? +

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

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

uber_get_auth_url is provided by the MCP Uber Server MCP server (199-mcp/mcp-uber). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Uber Server tool call.

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

CHECK YOUR STACK →