vault_creds
Get Windows Vault credentials. Auto-selects client.
What vault_creds does on Claude C2
AI agents call vault_creds to retrieve information from Claude C2 without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why vault_creds is rated Low
This tool retrieves sensitive data (Windows Vault credentials) without modifying or deleting it, placing it in the Read category. However, the severity is high because credential theft is a critical security risk—compromised credentials could enable account takeover, lateral movement, and unauthorized access to protected resources.
From the tool's definition Tool name 'vault_creds' and description 'Get Windows Vault credentials' indicates retrieval of stored credentials from the Windows Vault system.
Attacks that exploit this kind of access
The rule that runs vault_creds safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Claude C2, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For vault_creds, this is the rule to start with:
vault_creds is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Claude C2, apply this rule, and every vault_creds call is checked against it from then on.
Questions about vault_creds
Get Windows Vault credentials. Auto-selects client. It is categorised as a Read tool in the Claude C2 MCP Server, which means it retrieves data without modifying state.
Register the Claude C2 MCP server in PolicyLayer and add a rule for vault_creds: 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 Claude C2. Nothing to install.
vault_creds 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 vault_creds 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 vault_creds. 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.
vault_creds is provided by the Claude C2 MCP server (0xyg3n/claude-c2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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