# list_credentials

A read tool on the n8n MCP Server MCP server.

Agent View of the PolicyLayer registry record for `list_credentials`. HTML page: https://policylayer.com/tools/andhit-r-n8n-mcp/list-credentials

## Facts

- Tool: `list_credentials`
- Server: n8n MCP Server (`andhit-r/n8n-mcp`) — https://policylayer.com/tools/andhit-r-n8n-mcp.md
- Homepage: https://github.com/andhit-r/n8n-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why list_credentials is rated Low

This tool retrieves or queries existing credentials without creating, modifying, or deleting them. The blast radius of misuse is limited to information disclosure of credential metadata. The lack of a description lowers confidence slightly, but the name itself strongly suggests a simple enumeration operation typical of Read-category tools.

From the tool's own definition: "Tool name 'list_credentials' matches the 'list' pattern identified as a Read operation (search, list, get, fetch). No description provided, but the semantic content—retrieving a collection of credentials—indicates data retrieval without modification."

## Use case

AI agents call list_credentials to retrieve information from n8n MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches n8n MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_credentials": {}
  }
}
```

## Other tools on n8n MCP Server (21)

- `delete_credential` — Destructive — https://policylayer.com/tools/andhit-r-n8n-mcp/delete-credential.md
- `delete_execution` — Destructive — https://policylayer.com/tools/andhit-r-n8n-mcp/delete-execution.md
- `delete_tag` — Destructive — https://policylayer.com/tools/andhit-r-n8n-mcp/delete-tag.md
- `delete_variable` — Destructive — https://policylayer.com/tools/andhit-r-n8n-mcp/delete-variable.md
- `delete_workflow` — Destructive — https://policylayer.com/tools/andhit-r-n8n-mcp/delete-workflow.md
- `activate_workflow` — Execute — https://policylayer.com/tools/andhit-r-n8n-mcp/activate-workflow.md
- `deactivate_workflow` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/deactivate-workflow.md
- `get_audit_log` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/get-audit-log.md
- `get_credential` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/get-credential.md
- `get_execution` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/get-execution.md
- `get_workflow` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/get-workflow.md
- `list_executions` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/list-executions.md
- `list_tags` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/list-tags.md
- `list_variables` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/list-variables.md
- `list_workflows` — Read — https://policylayer.com/tools/andhit-r-n8n-mcp/list-workflows.md
- `create_credential` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/create-credential.md
- `create_tag` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/create-tag.md
- `create_variable` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/create-variable.md
- `create_workflow` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/create-workflow.md
- `update_tag` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/update-tag.md
- `update_workflow` — Write — https://policylayer.com/tools/andhit-r-n8n-mcp/update-workflow.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=andhit-r-n8n-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/andhit-r-n8n-mcp