[BUG] Available deferred tools getting truncated

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I connected Claude Code to the MCP server at https://github.com/exa-labs/exa-mcp-server/tree/main using the URL that they've provided to enable all tools, so my configuration in ~/.claude/mcp.json looks like:

{
"mcpServers": {
"exa": {
"url": "https://mcp.exa.ai/mcp?exaApiKey=<api_key>&tools=web_search_exa,web_search_advanced_exa,get_code_context_exa,company_research_exa,people_search_exa,crawling_exa,deep_researcher_start,deep_researcher_check,deep_search_exa"
}
}
}

However, it appears that only web_search_exa and get_code_context_exa are available to Claude Code; it's unable to call the other tools. I'm wondering why this may be the case. Thank you in advance for your help!

What Should Happen?

All 9 exa tools should be available to Claude Code, not just web_search_exa and get_code_context_exa.

Error Messages/Logs

Steps to Reproduce

1. In VS Code with the Claude Code extension installed, add the following to ~/.claude/mcp.json:

{
"mcpServers": {
"exa": {
"url": "https://mcp.exa.ai/mcp?exaApiKey=<api_key>&tools=web_search_exa,web_search_advanced_exa,get_code_context_exa,company_research_exa,people_search_exa,crawling_exa,deep_researcher_start,deep_researcher_check,deep_search_exa"
}
}
}

1. In the interactive Claude Code session, try asking Claude Code what exa tools it has available. It will only list web_search_exa and get_code_context_exa. You can also confirm this by running /mcp and observing the available tools for the exa mcp server.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.78

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_