🔄 Reauthenticate an existing remote MCP server connection. When an existing remote MCP server's OAuth tokens have expired or become invalid, use this tool to initiate a fresh authentication flow. This will start a new OAuth flow while preserving the server configuration. Use this when: - Server ...
Part of the DataGen server.
Free to start. No card required.
AI agents invoke ReAuthRemoteMcpServer to trigger processes or run actions in DataGen. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
ReAuthRemoteMcpServer can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"ReAuthRemoteMcpServer": {
"limits": [
{
"counter": "reauthremotemcpserver_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full DataGen policy for all 20 tools.
These attack patterns abuse exactly the kind of access ReAuthRemoteMcpServer gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
🔄 Reauthenticate an existing remote MCP server connection. When an existing remote MCP server's OAuth tokens have expired or become invalid, use this tool to initiate a fresh authentication flow. This will start a new OAuth flow while preserving the server configuration. Use this when: - Server tools stop working due to expired tokens - You receive authentication errors from MCP tools - OAuth tokens need to be refreshed for a connected server - Server connection has been lost and needs re-authentication Process: 1. Call this tool with the server name (must follow naming rules) 2. If OAuth is required, you'll get an auth_url 3. Complete authentication in the browser 4. Use checkRemoteMcpOauthStatus to verify completion Naming Rules: - Use only alphanumeric characters (no spaces, underscores, or dashes) - Start with an uppercase letter - Use CamelCase for multiple words - Examples: 'GitHub', 'Slack', 'GoogleDrive', 'OpenAI' Returns: Either immediate success or OAuth flow details for browser authentication. It is categorised as a Execute tool in the DataGen MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the DataGen MCP server in PolicyLayer and add a rule for ReAuthRemoteMcpServer: 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 DataGen. Nothing to install.
ReAuthRemoteMcpServer is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the ReAuthRemoteMcpServer 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.
Set action: deny in the PolicyLayer policy for ReAuthRemoteMcpServer. 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.
ReAuthRemoteMcpServer is provided by the DataGen MCP server (kuoyusheng/datagendev). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 DataGen tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.