bvandeusenandClaude Opus 5.5 5c6d9a7b55 fix(mcp): a tool's refusal reaches the agent with its reason (#4794) ...

SDK 2.x passes on only a ToolError's text. Any other exception becomes
UnexpectedToolError("Error executing tool X") and its message stays on the
server. ValueError is how every Scribe tool refuses — what was refused, why,
what to do instead — so every refusal reached the agent bare, and it could
only retry blind. Seen live: tune_retrieval(actor="operator") and
judge_menu(verdicts=[]) both answered "Error executing tool …" and nothing
else.

StrictArgsMCPServer.call_tool re-raises an UnexpectedToolError caused by a
ValueError as a ToolError carrying the message, in the SDK's own
"Error executing tool X: <reason>" shape. Other exceptions are crashes and
stay masked. The stale comment claiming the SDK returns ValueError text is
corrected.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-03 21:31:10 -04:00

..

tools

fix(retrieval): the review drops records written after the call it re-runs (#4773)

2026-10-03 19:42:20 -04:00

__init__.py

refactor: rename package fabledassistant -> scribe (code-only)

2026-06-03 15:48:35 -04:00

_context.py

feat(mcp): port the server to MCP Python SDK v2 (FastMCP → MCPServer) (#2196)

2026-09-24 07:21:27 -04:00

auth.py

refactor(mcp): one rules_payload() for every surface that hands rules to an agent; drop the dead bearer resolver (#2828, milestone 296 area 4)

2026-08-21 11:20:36 -04:00

server.py

fix(mcp): a tool's refusal reaches the agent with its reason (#4794)

2026-10-03 21:31:10 -04:00