[FEATURE] Changing the user agent on the Fetch() tool?

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Is there a way to change the user agent on the web fetch tool to just be a regular chrome browser?

Right now I'm using https://github.com/jae-jae/fetcher-mcp to have a random user agent.

Proposed Solution

Allow configuring the user agent the Fetch() tool uses.

Alternative Solutions

I use https://github.com/jae-jae/fetcher-mcp and it works great!

Priority

Critical - Blocking my work

Feature Category

API and model interactions

Use Case Example

Sometimes pages block user agents that doesn't have a proper windows or browser user agent.

Additional Context

_No response_