MCP Tool Reliability Fixes

We shipped a batch of reliability fixes for MCP tool connections, especially for tools installed from the marketplace.

What we fixed

• Re-authentication loop — reconnecting a tool that was already set up could get stuck in a loop asking for credentials repeatedly. Fixed.
• Orphaned connections — removing an MCP tool from your agent now properly cleans up the underlying connection, so you don't end up with stale credentials hanging around.
• Duplicate tool errors — installing a marketplace tool that was already partially configured no longer throws an error. It picks up where it left off.
• Broader tool compatibility — tools like BigQuery and Datadog now work correctly with the marketplace auth flow. We've improved how the platform detects and handles different authentication methods.
• OpenCode error messages — OpenCode users now see the actual error when something goes wrong (e.g. "Insufficient balance") instead of a generic "no text message found" message.