Description of the bug

It's basically caught in a loop, JPEG works.
I have auto allowed all MCP commands.

The attempt to take a full-page PNG screenshot failed due to an unsupported 'quality' parameter error.

LLM is GPT-5

Does this mean there is a problem in the MCP server?

Reproduction

Take a screenshot of the webpage

Expectation

Takes a screenshot

MCP configuration

Standard

Chrome DevTools MCP version

latest

Chrome version

Version 142.0.7444.175 (Official Build) (64-bit)

Coding agent version

Junie 252.487.87

Model version

GPT-5

Chat log

No response

Node version

24

Operating system

Linux

Extra checklist

• I want to provide a PR to fix this bug