claude-code - 💡(How to fix) Fix [Bug] Agent tool doesn't inherit deferred tools from parent agent

[{"error":"Error: Claude Code web sessions require authentication with a Claude.ai account. API key authentication is not sufficient. Please run /login to authenticate, or check your authentication status with /status.\n at cj (/$bunfs/root/src/entrypoints/cli.js:2883:9430)\n at QQ1 (/$bunfs/root/src/entrypoints/cli.js:2883:13850)\n at M67 (/$bunfs/root/src/entrypoints/cli.js:2883:14486)\n at W15 (/$bunfs/root/src/entrypoints/cli.js:5242:13343)\n at R15 (/$bunfs/root/src/entrypoints/cli.js:5242:13420)\n at n2 (/$bunfs/root/src/entrypoints/cli.js:472:26073)\n at useState (/$bunfs/root/src/entrypoints/cli.js:472:104913)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:463:8079)\n at Sr_ (/$bunfs/root/src/entrypoints/cli.js:5242:13380)\n at IZ7 (/$bunfs/root/src/entrypoints/cli.js:6032:20968)\n at async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:16607:1339)","timestamp":"2026-04-20T17:23:11.839Z"},{"error":"Error: Claude Code web sessions require authentication with a Claude.ai account. API key authentication is not sufficient. Please run /login to authenticate, or check your authentication status with /status.\n at cj (/$bunfs/root/src/entrypoints/cli.js:2883:9430)\n at QQ1 (/$bunfs/root/src/entrypoints/cli.js:2883:13850)\n at M67 (/$bunfs/root/src/entrypoints/cli.js:2883:14486)\n at W15 (/$bunfs/root/src/entrypoints/cli.js:5242:13343)\n at R15 (/$bunfs/root/src/entrypoints/cli.js:5242:13420)\n at n2 (/$bunfs/root/src/entrypoints/cli.js:472:26073)\n at useState (/$bunfs/root/src/entrypoints/cli.js:472:104913)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:463:8079)\n at Sr_ (/$bunfs/root/src/entrypoints/cli.js:5242:13380)\n at hZ7 (/$bunfs/root/src/entrypoints/cli.js:6032:14287)\n at async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:16607:1339)","timestamp":"2026-04-20T17:23:11.839Z"},{"error":"Error: Request was aborted.\n at makeRequest (/$bunfs/root/src/entrypoints/cli.js:50:3448)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T17:24:10.268Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: "pyright-langserver"\n at start (/$bunfs/root/src/entrypoints/cli.js:1540:22340)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T20:49:15.854Z"},{"error":"Error\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:1540:20876)\n at w (/$bunfs/root/src/entrypoints/cli.js:1540:24859)\n at $ (/$bunfs/root/src/entrypoints/cli.js:1540:29930)\n at w (/$bunfs/root/src/entrypoints/cli.js:1540:30267)\n at Y (/$bunfs/root/src/entrypoints/cli.js:1540:30813)\n at call (/$bunfs/root/src/entrypoints/cli.js:2124:1357)\n at processTicksAndRejections (unknown:7:39)","timestamp":"2026-04-20T20:49:15.854Z"},{"error":"Error: Failed to start LSP server for file /Users/ashhar.hasan/code/src/github.com/trinodb/trino-python-client/.github/scripts/update_python_versions.py: Executable not found in $PATH: "pyright-langserver"\n at $ (/$bunfs/root/src/entrypoints/cli.js:1540:29956)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T20:49:15.854Z"},{"error":"Error\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:1540:20876)\n at w (/$bunfs/root/src/entrypoints/cli.js:1540:24859)\n at $ (/$bunfs/root/src/entrypoints/cli.js:1540:29930)\n at w (/$bunfs/root/src/entrypoints/cli.js:1540:30267)\n at Y (/$bunfs/root/src/entrypoints/cli.js:1540:30813)\n at call (/$bunfs/root/src/entrypoints/cli.js:2124:1357)\n at processTicksAndRejections (unknown:7:39)","timestamp":"2026-04-20T20:49:15.854Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: "pyright-langserver"\n at start (/$bunfs/root/src/entrypoints/cli.js:1540:22340)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T20:53:58.497Z"},{"error":"Error: Executable not found in $PATH: "pyright-langserver"\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunf…

TL;DR

The issue can be mitigated by ensuring that agents spawned via the Agent tool have access to deferred tools like WebSearch, potentially by using ToolSearch to load them.

Guidance

• The errors suggest issues with authentication and executable paths, but the primary problem seems to be the lack of access to deferred tools for agents.
• Verify if the agents have the necessary permissions and configurations to access these tools.
• Check the documentation or support resources for the Agent tool and ToolSearch to understand how to properly load and use deferred tools.
• Consider testing the ToolSearch functionality with a simple task to ensure it works as expected before delegating more complex tasks to agents.

Example

No specific code example can be provided without more context on the Agent tool's API or the exact commands used to spawn agents and load tools.

Notes

The provided error messages include a variety of issues, including authentication problems and executable not found errors, which may be related to or separate from the primary issue of agents not having access to deferred tools. The solution may involve addressing these underlying issues as well.

Recommendation

Apply a workaround by using ToolSearch to load deferred tools for agents, as this directly addresses the stated problem and may resolve or mitigate the issue.