list_credentials

List all stored credentials (metadata only, no plaintext).

SERVERKiln SOURCEcodeofaxel/Kiln

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kiln/list-credentials.md

WHAT IT DOES

What list_credentials does on Kiln

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

RISK

Why list_credentials is rated Low

This is a Read operation as it queries and retrieves stored credential metadata. However, severity is elevated to 'medium' rather than 'low' because credentials metadata (such as account names, service types, or last-access timestamps) can be sensitive information useful for reconnaissance or privilege escalation attacks.

From the tool's definition Tool name 'list_credentials' and description 'List all stored credentials (metadata only, no plaintext)' indicates retrieval of credential metadata without modification or execution.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_credentials safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Kiln, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_credentials, this is the rule to start with:

list_credentials Allowed

list_credentials is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Kiln, apply this rule, and every list_credentials call is checked against it from then on.

FAQ

Questions about list_credentials

What does the list_credentials tool do? +

List all stored credentials (metadata only, no plaintext). It is categorised as a Read tool in the Kiln MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_credentials? +

Register the Kiln 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 Kiln. Nothing to install.

What risk level is list_credentials? +

list_credentials is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_credentials? +

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.

How do I block list_credentials completely? +

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.

What MCP server provides list_credentials? +

list_credentials is provided by the Kiln MCP server (codeofaxel/Kiln). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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