refresh_auth

Server Fusebase MCP Server ryan-haver/fusebase-mcp

Category Execute

Risk class High

Parameters 00 required

WHAT IT DOES

What refresh_auth does on Fusebase MCP Server

AI agents invoke refresh_auth to trigger actions in Fusebase MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why refresh_auth needs a policy

This tool executes a browser automation session via Playwright to refresh authentication cookies. It triggers an external browser operation whose effects depend on arguments (e.g., interactive=true opens a visible browser window).

From the tool's definition re-launching a Playwright browser session

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

refresh_auth Rate-limited

refresh_auth stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "refresh_auth": {
      "limits": [
        {
          "counter": "refresh_auth_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about refresh_auth

What does the refresh_auth tool do? +

Refresh Fusebase authentication cookies by re-launching a Playwright browser session. Use this when other tools return 401/auth errors. Set interactive=true to open a visible browser window for manual login. Returns cookie age and expiry info. It is categorised as a Execute tool in the Fusebase MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on refresh_auth? +

Register the Fusebase MCP Server MCP server in PolicyLayer and add a rule for refresh_auth: 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 Fusebase MCP Server. Nothing to install.

What risk level is refresh_auth? +

refresh_auth is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit refresh_auth? +

Yes. Add a rate_limit block to the refresh_auth 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 refresh_auth completely? +

Set action: deny in the PolicyLayer policy for refresh_auth. 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 refresh_auth? +

refresh_auth is provided by the Fusebase MCP Server MCP server (ryan-haver/fusebase-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

refresh_auth is one line of Fusebase MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →