Charlie Marsh fb2b06a829 Surface MCP server startup errors when preparing cached tool calls (#60038) ...

## Why

A cached MCP tool can remain advertised after its server fails to start. Calling it previously returned a generic unavailable-tool error, hiding the startup failure from the model.

## What changed

Propagate preparation errors through MCP tool calls and recorded approval preparation, preserving the error chain and adding the server name to startup failures. Keep the unavailable-tool error for tools that are missing, filtered, or no longer visible to the model.

## Testing

Update the executor capability downgrade test to require the credential resolution startup error in the model's tool output and assert that the host token is absent.

GitOrigin-RevId: 434074eb748165b2fe19de3a40046835f26992df

2026-11-07 02:28:22 +00:00

..

common

Stabilize cross-platform tests and directory-change fork permissions (#59369)

2026-11-04 09:51:28 +00:00

suite

Surface MCP server startup errors when preparing cached tool calls (#60038)

2026-11-07 02:28:22 +00:00

all.rs

[codex] Use expect in integration tests (#28441)

2026-06-15 21:53:47 -07:00

prompt_prefix.rs

Disable bundled skills in the prompt-prefix comparison test (#60017)

2026-11-07 00:54:03 +00:00