**Bug Description** ⏰ [20:12:17] received **Bug report text — `/bug`:** - **Tool affected:** `mcp__visualize__show_widget` and its companion `read_me` (the inline widget-rendering MCP tool in Claude Code) - **Symptom:** every call returns `Tool call failed: 404`, no other error detail - **Frequency:** 15+ consecutive attempts over roughly 2 hours, same conversation - **Tried, none fixed it:** `/mcp reconnect`, a full quit-and-relaunch, reloading the tool schema via ToolSearch - **Still workin

[Bug] MCP Tool `mcpvisualizeshow_widget` returns persistent 404 error

Status Open

Reported on v2.1.206

Maintainer reply None cached

Activity 0 comments · opened Aug 29, 2026

Bug Description
⏰ [20:12:17] received

Bug report text — /bug:

Tool affected: mcp__visualize__show_widget and its companion read_me (the inline widget-rendering MCP tool in Claude Code)
Symptom: every call returns Tool call failed: 404, no other error detail
Frequency: 15+ consecutive attempts over roughly 2 hours, same conversation
Tried, none fixed it: /mcp reconnect, a full quit-and-relaunch, reloading the tool schema via ToolSearch
Still working fine: the Artifact publishing tool — full HTML/CSS renders correctly every time in the side panel, so this looks isolated to the inline pathway specifically
Anthropic status page: showed "All Systems Operational" during this outage — this tool isn't a listed component there
Environment: Claude Code on macOS (M5 Pro), rooted at /Users/admin/xxxxxxx/xxxxxxx/xxxxxx
Timing: first observed ~17:41 IST 2026-08-29, still failing as of 20:12 IST same day

Input alignment 93%.

CRUX — Key Takeaways: text above is ready to paste as-is into /bug. Next Steps: run /bug, paste this, submit.

Footnotes: MCP = Model Context Protocol.

⏰ 20:17:24 responded

Environment Info

Errors

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