Summary

When using Google Antigravity (google-antigravity/gemini-3-flash), tool calls are being displayed as text in the chat instead of being executed. The output format is:

[Tool Call: gateway (ID: gateway_1768372099304_19)] Arguments: { "action": "config.get" }

Steps to reproduce

Fresh install on macOS
Configure with google-antigravity/gemini-3-flash
Send any message that triggers a tool call (like "list all session files")
Agent outputs [Tool Call: ...] text instead of executing the tool
Agent stops until another message is sent

Environment

• Clawdbot version: 2026.1.13 Also tried latest from git main shows 2026.1.14
• OS: macOS
• Install method (pnpm/npx/docker/etc): npm and pnpm

Logs or screenshots

06:02:29 info gateway/channels/whatsapp/inbound {"subsystem":"gateway/channels/whatsapp/inbound"} Inbound message +1 -> +1 (direct, 147 chars)
06:02:30 debug agent/embedded {"subsystem":"agent/embedded"} embedded run start: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2 sessionId=d95677ec-fd7f-4aaf-82b7-38b45bcd6358 provider=google-antigravity model=gemini-3-flash thinking=low messageChannel=whatsapp
06:02:30 info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
06:02:30 warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
06:02:30 warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
06:02:30 debug agent/embedded {"subsystem":"agent/embedded"} embedded run prompt start: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2 sessionId=d95677ec-fd7f-4aaf-82b7-38b45bcd6358
06:02:30 debug agent/embedded {"subsystem":"agent/embedded"} embedded run agent start: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2
06:02:31 debug agent/embedded {"subsystem":"agent/embedded"} embedded run agent end: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2
06:02:31 debug agent/embedded {"subsystem":"agent/embedded"} embedded run prompt end: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2 sessionId=d95677ec-fd7f-4aaf-82b7-38b45bcd6358 durationMs=1466
06:02:31 debug agent/embedded {"subsystem":"agent/embedded"} embedded run done: runId=925ce5ec-58d0-4fac-b66c-3baeb6c2e7d2 sessionId=d95677ec-fd7f-4aaf-82b7-38b45bcd6358 durationMs=1493 aborted=false
06:02:31 debug gateway/channels/whatsapp/outbound {"subsystem":"gateway/channels/whatsapp/outbound"} Sent chunk 1/1 to +1 (9ms)

2026-01-14T06:21:27.107Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:21:27.108Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:21:27.108Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:24:26.666Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:24:26.667Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:24:26.669Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:25:42.968Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:25:42.970Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:25:42.971Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:26:36.994Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:26:36.995Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:26:36.996Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:27:42.865Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:27:42.867Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:27:42.868Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:28:01.113Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:28:01.114Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:28:01.115Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:28:53.383Z info agent/embedded {"subsystem":"agent/embedded"} {"provider":"google-antigravity","toolCount":21,"tools":["0:read","1:edit","2:write","3:exec","4:bash","5:process","6:whatsapp_login","7:browser","8:canvas","9:nodes","10:cron","11:message","12:gateway","13:agents_list","14:sessions_list","15:sessions_history","16:sessions_send","17:sessions_spawn","18:session_status","19:memory_search","20:memory_get"]} google tool schema snapshot
2026-01-14T06:28:53.384Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":7,"tool":"browser","violations":["browser.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
2026-01-14T06:28:53.385Z warn agent/embedded {"subsystem":"agent/embedded"} {"index":8,"tool":"canvas","violations":["canvas.parameters.properties.format"],"violationCount":1} google tool schema has unsupported keywords
Log tail truncated (increase --max-bytes).

Chatted with Krill here (https://discord.com/channels/1456350064065904867/1460869535945982065) and he says

Root Cause:
The downgradeGeminiHistory function in src/agents/pi-embedded-helpers/google.ts is converting ALL tool calls to text when they lack thought_signature, not just historical ones. This function runs in sanitizeSessionHistory before every agent run for Google models, incorrectly converting pending tool calls to text.