error
Original activation assertion failed. Controlled traces on 0.11.0 and 0.12.0 show successful tools/call followed by an internal tools/list schema lookup returning 404. Prelisting tools restores activation completion. No server regression established.
Source: https://github.com/anilloutombam/mcp-failure-lab/blob/main/docs/compatibility/v0.12.0.md
View raw evidence
Original activation assertion failed. Controlled traces on 0.11.0 and 0.12.0 show successful tools/call followed by an internal tools/list schema lookup returning 404. Prelisting tools restores activation completion. No server regression established.