Multi-Server Resolution

When action=call is used without server=, bridge can auto-resolve matching tools.

Resolution logic

1. One matching server -> dispatch directly
2. Multiple matches + explicit server -> explicit target wins
3. Multiple matches + no server -> score candidates:
   • base priority from config order
   • recency boost if used in recent successful calls
   • parameter-name overlap with tool input schema

If top score gap is >= 0.15, bridge auto-dispatches. Otherwise, it returns an ambiguous response with candidates.

This lets agents omit server when intent is clear, but still get a safe disambiguation response when uncertain.