authenticate-with-credentials

THE RISK

Low Risk

Why authenticate-with-credentials needs a policy

This tool performs authentication/session establishment, not reading, writing, executing, destroying data, or moving money. It sets up credentials for subsequent operations but does not itself retrieve, modify, or delete resources. Categorized as Other since authentication is a session management action that doesn't fit the primary risk categories.

From the tool's definition Authenticate with the PI API using username and password (last resort option)

Documented attack patterns abuse exactly the kind of access authenticate-with-credentials gives an agent:

POLICY

How to control authenticate-with-credentials

PolicyLayer is an MCP gateway — it sits between your AI agents and PI API MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for authenticate-with-credentials:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "authenticate-with-credentials": {
      "limits": [
        {
          "counter": "authenticate-with-credentials_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

authenticate-with-credentials gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register PI API MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More PI API MCP Server tools

Destructive delete-category Delete a category Destructive delete-chart Delete a chart Write create-category Create a new category Write set-api-url Set the API base URL for all requests Write set-organization Set the organization ID for subsequent requests Write update-category Update an existing category Other authenticate Guide for authenticating with the PI API Read check-connection Check if the current API URL and authentication are valid

All 18 PI API MCP Server tools →

Other tools on other servers

Android Forensics ADB MCP Server generate_app_analysis_report Ethereum Tools add Math MCP Server complex_analysis_suite Crypto_MCP aes_encrypt

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about authenticate-with-credentials

What does the authenticate-with-credentials tool do? +

Authenticate with the PI API using username and password (last resort option). It is categorised as a Other tool in the PI API MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on authenticate-with-credentials? +

Register the PI API MCP Server MCP server in PolicyLayer and add a rule for authenticate-with-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 PI API MCP Server. Nothing to install.

What risk level is authenticate-with-credentials? +

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

Can I rate-limit authenticate-with-credentials? +

Yes. Add a rate_limit block to the authenticate-with-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 authenticate-with-credentials completely? +

Set action: deny in the PolicyLayer policy for authenticate-with-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 authenticate-with-credentials? +

authenticate-with-credentials is provided by the PI API MCP Server MCP server (mingzilla/pi-api-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every PI API MCP Server tool call.

Start from PI API MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →