[Bug]: Playright MCP - McpError: MCP error -32601: Method not found

[davidkgp]

What happened?

I am running Playright mcp server locally

npx @playwright/mcp@latest --port 8931
Listening on http://localhost:8931
Put this in your client config:
{
  "mcpServers": {
    "playwright": {
      "url": "http://localhost:8931/mcp"
    }
  }
}

when i use MCP Discovery Node with Output Prompts disabled -

I get McpError: MCP error -32601: Method not found

while inspecting with wiremock it seems the prompts call is still made

{"method":"prompts/list","jsonrpc":"2.0","id":1}
HTTP/1.1 200 OK
Content-Type: text/event-stream
Cache-Control: no-cache
Connection: keep-alive
mcp-session-id: f51af558-0902-48c7-b2cb-341667a79854
Date: Fri, 12 Sep 2025 20:30:09 GMT
Transfer-Encoding: chunked

event: message
data: {"jsonrpc":"2.0","id":1,"error":{"code":-32601,"message":"Method not found"}}

This also happens in STDIO mode

What was the expected functionality?

MCP Discovery Node's underlying call should respect the toggles on th ui and not call the prompts/list call

Describe your environment

MacOS
npm --version 11.6.0
node --version v24.2.0
npx --version 11.6.0
Rivet 1.11.3

Relevant log output

Relevant screenshots

No response

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