Module cache 

MCP tool metadata disk cache.

Persists the tool list discovered from each server so that proxy search, list, and describe operations can work without a live connection (and without paying the cost of spawning every server at startup).

Important: the cache stores original (unprefixed) tool names only. The prefixed name is computed at runtime from the current ToolPrefix setting. This way, changing tool_prefix in mcp.json does not invalidate the cache.

File format

{
  "version": 1,
  "servers": {
    "chrome-devtools": {
      "updated_at": "2026-06-13T10:30:00Z",
      "tools": [
        { "name": "take_screenshot", "description": "...", "input_schema": { ... } }
      ]
    }
  }
}

Structs

MetadataCache

In-memory + on-disk metadata cache.