[BUG] WebSearch, Token Counting API unavailable on bedrock-connected billing accounts

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?

Several Claude API features that work with direct Anthropic API billing are not available when using AWS Bedrock-connected accounts.

• WebSearch tool
• Token Counting API

Evidence -

Web Search("lazy execution programming concept")
⎿ Did 0 searches in 769ms

⏺️ Web Search("lazy execution lazy evaluation programming")
⎿ Did 0 searches in 854ms

⏺️ The web search is returning errors. Here's what I know about lazy execution:

What Should Happen?

Expected Behavior

These features should either work on Bedrock, or Claude Code should gracefully
handle their absence with clear messaging (e.g., "WebSearch is not available on
your API provider — falling back to WebFetch").

Currently there is no documentation or in-app indication that these features are
Anthropic-direct-only.

Actual Behavior

Features silently fail or produce errors without indicating the root cause is the
Bedrock API provider.

Error Messages/Logs

Steps to Reproduce

1. Run Claude on bedrock billed account
2. Prompt to search for anything - "Search for lazy execution"

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.71 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_