ttfb

What ttfb does on Mcp

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

Parameters from the server's own tool schema.

Why ttfb is rated Low

This tool performs a network measurement operation that retrieves timing data about HTTP responses. It queries a remote URL and measures latency metrics, which is a read-only operation with no side effects, data modification, code execution, or destructive capabilities. The low severity reflects that misuse would only expose performance metrics without enabling further attacks or data manipulation.

From the tool's definition Tool name 'ttfb' and description 'Measure Time To First Byte (TTFB) for a URL' indicate measurement/monitoring of HTTP response timing metrics without modifying or executing arbitrary code on target systems.

Risk signalsAccepts URL/endpoint input (url)

The rule that runs ttfb safely

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

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

Questions about ttfb