## Summary

<!-- 1-3 bullets on what changed and why. -->

## Test plan

- [ ] `make test` passes locally
- [ ] `golangci-lint run` is clean
- [ ] If a tool was added/removed: README.md and README.zh-CN.md updated
- [ ] If a tool was added/removed: `internal/mcp/server_test.go:TestRegisteredToolCount` updated
- [ ] CHANGELOG.md `[Unreleased]` section updated for user-visible changes

## Related issues

<!-- Closes #123, refs #456 -->
