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TUI permission prompt for MCP tools doesn't show the call arguments #60350
Description
Description
When an MCP tool asks for permission, the TUI prompt shows only the tool name:
△ Permission required
⚙ Call tool linear_save_comment
Tool: linear_save_comment
The arguments (which issue, what the comment says) are not shown anywhere, so approving a write means approving it blind. The tool line in the transcript above the prompt leaves out object arguments too.
Since #51062 the MCP wrapper passes the call arguments as metadata.input, so the data reaches the prompt. The fallback branch in packages/tui/src/util/permission.ts just doesn't render it. #51519 is the same problem in the web/desktop dock, and #50234 the general version of it.
Plugins
None needed to reproduce
OpenCode version
1.19.4, and still on dev (085d6f7)
Steps to reproduce
- Add a remote MCP server with a write tool and set its permission to ask.
- Ask the agent to call the write tool.
- The prompt shows
Call tool <name>andTool: <name>, but no arguments.
Screenshot
See the prompt above.
Operating System
macOS 26
Activity
opencodejr commentedon Oct 29, 2026
Thanks for the clear report and for pointing to the exact code, @rmcilraith!
You're asking for the TUI permission prompt (and the tool line in the transcript) to show the arguments of an MCP tool call, so that approving a write isn't done blind. I checked current
dev. The MCP wrapper does pass the arguments asmetadata.input(since #51062), but the generic branch inpackages/tui/src/util/permission.tswas only ever built to show the tool name. Since the prompt is working as it was written, I've filed this as a feature request rather than a bug. Maintainers will consider it.This can't be done as a plugin today: the TUI plugin API has no slot for the permission prompt and no hook for how a tool call's arguments are shown.
Related issues:
*, not the tool name #51519: the web/desktop MCP permission prompt shows only*, not the tool namermcilraith commentedon Oct 29, 2026
I have a small fix ready if a maintainer wants it: dev...rmcilraith:opencode:fix/tui-mcp-permission-args
The fallback branch lists each argument under the tool name (
issueId: ENG-1,body: Looks good), from the tool part input ormetadata.input. Objects are shown as one line of JSON. It's about 10 lines plus a test, and tools with their own layout (edit, shell, webfetch, ...) are unchanged. Happy to open a PR or change the approach.