List all credentials
AI agents call list_credentials to retrieve information from N8N MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/lists credentials without modifying them, fitting the Read category. While the data returned (credentials/secrets) is highly sensitive and could be misused by a malicious actor if disclosed, the tool itself performs no destructive or write operation.
From the tool's definition Tool name 'list_credentials' and description 'List all credentials' indicate a query/retrieval operation that does not modify data. However, credentials typically contain sensitive authentication tokens and API keys.
Attacks that exploit this kind of access
List all credentials. It is categorised as a Read tool in the N8N MCP Server MCP Server, which means it retrieves data without modifying state.
Register the N8N MCP Server MCP server in PolicyLayer and add a rule for list_credentials: 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 N8N MCP Server. Nothing to install.
list_credentials is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_credentials 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 list_credentials. 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.
list_credentials is provided by the N8N MCP Server MCP server (rajtrafficradius/n8n-mcpv2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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