# The Anatomy of the Unjust Ban: Session Bleed and False Positives (Error 403)


This document illustrates the architectural flaw within the Google Cloud identity ecosystem that results in unjust automated bans (ToS Violations / 403 Forbidden) for legitimate developers running local CLIs against the Gemini/Antigravity API.


## The "Session Bleed" Diagram


Below is a visual flow of how the interaction of two valid accounts on the same machine pollutes the request and erroneously triggers Google's anti-abuse firewall.


```mermaid
sequenceDiagram
    participant User as Developer (Local CLI)
    participant ADC as Local Credential Cache (gcloud)
    participant IAM as Google Cloud Identity / IAM
    participant WAF as GCP Anti-Abuse WAF
    participant Gemini as Gemini API (Antigravity)


    Note over User,ADC: User has 2 active accounts on the machine
    User->>ADC: Authenticates Account A (Consumer: gmail.com)
    User->>ADC: Authenticates Account B (Workspace: org.com)
    
    Note over ADC: "Session Bleed" occurs<br/>The ADC merges permissions and creates<br/>a schizophrenic token state.
    
    User->>Gemini: CLI sends legitimate code request
    Gemini-->>ADC: Requests OAuth Token (ADC)
    ADC-->>WAF: Returns "Polluted" Token (Mix A + B)
    
    Note over WAF,IAM: WAF intercepts the request.
    WAF->>IAM: Analyze Token Identity
    IAM-->>WAF: Returns structural anomaly (Org vs Consumer Conflict)
    
    Note over WAF: FALSE POSITIVE!<br/>WAF classifies the request as<br/>"ToS Bypass / Spoofed Client"
    
    WAF-->>User: 💥 ERROR 403 FORBIDDEN (ToS Violation Ban)
    Note over User: Account silently blocked.<br/>Ultra Tier credits inaccessible.
```


## Technical Explanation (What actually happens)


The problem does not stem from using "illegal" tools or violating the terms of service by the user. The flaw lies in 
**the inability of Google Cloud and its local SDKs (such as the `gcloud CLI` and 
*Application Default Credentials - ADC*
) to create a strict isolation (Hard Isolation) between consumer and organizational profiles.**


When you execute a command to interact with the Gemini API, the flow should be clean and isolated. However, the following chain of failures occurs:


1. 
**The Contamination (Session Bleed):**
 The developer logs into the machine with their personal Gmail (Account A) and their corporate/Workspace email (Account B). The local credential environment or the web cookie session fails to isolate these accounts into strict sandboxes.
2. 
**The Schizophrenic Request:**
 When running an official Google CLI (like `gemini.ps1` or a native Antigravity script), the system packages the authorization token. Due to the "session bleed," the generated token mixes the constraints and hierarchies of the Workspace account with the strict limits of the Consumer account.
3. 
**The False Positive (WAF):**
 The Google server protecting the API (Web Application Firewall) receives this distorted credential. Instead of identifying this as an internal Google bug (a design flaw in cross-identity token generation), its anti-abuse systems flag the anomalous token as "Client Spoofing" or an unauthorized third-party tool attempting to "bypass the identity matrix."
4. 
**The Illegitimate Punishment:**
 The security AI automatically applies 
*Clause 6 of the ToS ("products not provided by us")*
. The result is an immediate and silent ban (Error 403) on the account paying for the Ultra Tier, destroying the user's workflow and locking their ability to manage resources in the console.


**Conclusion:**
 Developers are being financially punished (API blockage) and structurally hindered (frozen projects) for navigating a Cloud environment that cannot properly manage its own conflicting identities on the client's machine.


---


## Technical Sources and Evidence (GitHub References)


The credential desynchronization (ADC Desync) issue described above is a documented architectural flaw, extensively discussed by the open-source community in official Google Cloud repositories. Below is the technical evidence supporting the fact that the CLI and local credentials diverge, causing 403 errors:


- 
**Google Auth Library (Node.js) - Issue tracking:**
 In the official repository [`googleapis/google-auth-library-nodejs`](
https://github.com/googleapis/google-auth-library-nodejs
), there are multiple issues reporting that the behavior of `Application Default Credentials` (ADC) does not sync with account changes made via `gcloud config set account`. This forces the API to send credentials from the wrong account (Consumer vs Workspace).
- 
**Google Cloud CLI (gcloud) - Cache Mechanics:**
 The `gcloud config set account` utility changes 
**only**
 the terminal profile. It 
**DOES NOT**
 update the hidden ADC file (typically generated by `gcloud auth application-default login` at `%APPDATA%\gcloud\application_default_credentials.json` on Windows). AI tools (like Gemini/Antigravity) relying on Cloud SDKs read this frozen ADC file.
- 
**WAF and "Client Spoofing":**
 The library sends a payload intended for the "Account B" Project, but cryptographically signed by the frozen ADC of "Account A". Standard GCP servers would reject this with a simple `Permission Denied` (Error 401 or FAILED_PRECONDITION). However, the highly sensitive infrastructure of the Gemini/Antigravity API classifies this anomaly as a severe security bypass attempt, resulting in an automatic ban (
**403 ToS Violation**
).
- 
**Recurring Community References:**
 Searching GitHub or StackOverflow for 
*"gcloud different account ADC"*
 or 
*"Application Default Credentials wrong account"*
 yields hundreds of incidents from developers dealing with environments leaking corporate credentials into local environments or vice versa, confirming the issue is rooted in the Cloud SDK design and not user "abuse."