MCP tool call broken in version 0.64.0
Resolved 💬 2 comments Opened Dec 3, 2025 by benarroyo Closed Dec 3, 2025
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of Codex is running?
0.64.0
What subscription do you have?
Plus
Which model were you using?
gpt-oss
What platform is your computer?
MacOS
What issue are you seeing?
MCP tool call is broken in version 0.64.0.
Seems like arguments are missed:
• Called jetbrains.search_in_files_by_text()
└ MCP tool call has been failed: No argument is passed for required parameter 'searchText'Downgrading to version 0.63.0 fixes the issue.
What steps can reproduce the bug?
Register an MCP and force the agent to call it with arguments.
What is the expected behavior?
Correctly invoke the MCP including the arguments in the call.
Additional information
This is a regression issue. Works fine in version 0.63.0
2 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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This is a duplicate of:
As a workaround, try switching to wire_api = "responses". This newer API is recommended over the older "chat" API.