# update_auth_user

A write tool on the Supabase MCP Server - Self-Hosted Edition MCP server.

Agent View of the PolicyLayer registry record for `update_auth_user`. HTML page: https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/update-auth-user

## Facts

- Tool: `update_auth_user`
- Server: Supabase MCP Server - Self-Hosted Edition (`abdqum/supabase-mcp-selfhosted`) — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted.md
- Homepage: https://github.com/abdqum/Supabase-MCP-SelfHosted
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "update_auth_user",
    "arguments": {}
  }
}
```

## Why update_auth_user is rated Medium

This tool creates or modifies user authentication records reversibly (passwords, email, profile data can be changed again), placing it in the Write category. Severity is high because unauthorized modification of authentication credentials or user accounts could grant attackers access to systems or compromise user identities, affecting multiple users depending on agent context.

From the tool's own definition: "Tool name 'update_auth_user' indicates modification of authentication user records. Server context shows this is a Supabase authentication management tool."

## Use case

AI agents use update_auth_user to create or update resources in Supabase MCP Server - Self-Hosted Edition, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Supabase MCP Server - Self-Hosted Edition environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Supabase MCP Server - Self-Hosted Edition:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_auth_user": {
      "limits": [
        {
          "counter": "update_auth_user_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Supabase MCP Server - Self-Hosted Edition (56)

- `delete_auth_user` — Destructive — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/delete-auth-user.md
- `delete_subscription` — Destructive — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/delete-subscription.md
- `apply_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/apply-migration.md
- `auto_create_indexes` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/auto-create-indexes.md
- `auto_migrate` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/auto-migrate.md
- `execute_psql` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/execute-psql.md
- `execute_sql` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/execute-sql.md
- `manage_docker` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-docker.md
- `manage_functions` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-functions.md
- `manage_triggers` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-triggers.md
- `push_migrations` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/push-migrations.md
- `realtime_management` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/realtime-management.md
- `rebuild_hooks` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/rebuild-hooks.md
- `smart_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/smart-migration.md
- `sync_schema` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/sync-schema.md
- `vacuum_analyze` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/vacuum-analyze.md
- `validate_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/validate-migration.md
- `hello` — Other — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/hello.md
- `analyze_performance` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/analyze-performance.md
- `analyze_rls_coverage` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/analyze-rls-coverage.md
- `audit_security` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/audit-security.md
- `check_health` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/check-health.md
- `generate_typescript_types` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/generate-typescript-types.md
- `get_anon_key` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-anon-key.md
- `get_auth_user` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-auth-user.md
- `get_database_connections` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-database-connections.md
- `get_database_stats` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-database-stats.md
- `get_logs` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-logs.md
- `get_project_url` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-project-url.md
- `get_service_key` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-service-key.md
- …and 26 more: https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=abdqum-supabase-mcp-selfhosted · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/abdqum-supabase-mcp-selfhosted