MCP Router: schema.maxConcurrentValidations

schema.maxConcurrentValidations controls process-wide admission to input and output schema validation work.

• Type: Positive integer
• Default: 32

The runtime creates at most this many validation workers, capped further by available CPU parallelism, and uses the same value as the bounded work queue and admission semaphore. When capacity is exhausted, the tool call fails safely with an MCP error result instead of waiting in an unbounded queue. Each gateway replica maintains its own pool.