Add Gemini CLI extension context file for improved tool usage guidance for CLI #709
Description
Is your feature request related to a problem? Please describe.
When using Chrome DevTools MCP with Gemini CLI, the AI doesn't have built-in knowledge of how to effectively use the available tools. Users interacting with Gemini CLI could get mixed results especially if similar MCP tools exists from other installed servers in the context.
Describe the solution you'd like
Add a gemini-extension.md context file that provides system-level instructions to Gemini CLI when this extension is installed. We'd also need to update the gemini-extension.json to reference the new file via the contextFileName property.
Describe alternatives you've considered
This is how Gemini CLI Extensions work best so there is not an alternative to suggest
Additional context
I'm from the Gemini CLI team and figured it would not hurt to add this feature, so will be submitting a PR as a starting point for this. But expert users of this MCP server might find additional instructions to include in the markdown that I'm not considering.