capture_stripe_credentials · Psamvault MCP: Risk & Policy

WHAT IT DOES

What capture_stripe_credentials does on Psamvault

AI agents use capture_stripe_credentials to create or update resources in Psamvault — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Psamvault environment.

WHY IT NEEDS A POLICY

Why capture_stripe_credentials needs a policy

This tool captures (stores/writes) Stripe API credentials into the psamvault vault. It is a Write operation because it creates new credential entries in the vault. Severity is high because it handles Stripe API keys which are financial-service credentials; misuse could store malicious or attacker-controlled credentials, potentially enabling financial abuse via those credentials later.

From the tool's definition 'Capture credentials provisioned by Stripe Projects into psamvault' — stores/writes credential data into the vault

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

capture_stripe_credentials Rate-limited

capture_stripe_credentials stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "capture_stripe_credentials": {
      "limits": [
        {
          "counter": "capture_stripe_credentials_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Psamvault, so you can run agents against it safely.

FAQ

Questions about capture_stripe_credentials

What does the capture_stripe_credentials tool do? +

[🔑 API Key Operations] Capture credentials provisioned by Stripe Projects into psamvault. It is categorised as a Write tool in the Psamvault MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on capture_stripe_credentials? +

Register the Psamvault MCP server in PolicyLayer and add a rule for capture_stripe_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 Psamvault. Nothing to install.

What risk level is capture_stripe_credentials? +

capture_stripe_credentials is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit capture_stripe_credentials? +

Yes. Add a rate_limit block to the capture_stripe_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 capture_stripe_credentials completely? +

Set action: deny in the PolicyLayer policy for capture_stripe_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 capture_stripe_credentials? +

capture_stripe_credentials is provided by the Psamvault MCP server (psam-717/psamvault-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.