Tool I/O Bridge: bounded execution contract

A tool bridge should separate model intent from physical execution. Publicly useful design principles are explicit schemas, least-privilege capabilities, deterministic validation, bounded resources and reconstructable evidence.

Public contract pattern

• Accept only declared tool names and schema-valid arguments.
• Resolve authority before execution; model output alone is not permission.
• Apply workflow-specific limits, approval gates and prohibited-action rules.
• Record request, authorization decision, execution result and relevant provenance.
• Fail closed when required authority or evidence is absent.

Internal execution routes, service addresses, hostnames, IP addresses, credentials, registry paths and operator-control interfaces are intentionally omitted from this public reference.