TR-2026-01: Deterministic Policy Enforcement, Monotonic Delegation Attenuation, and OCSF Provenance for Enterprise Multi-Agent Systems

As enterprise organizations transition from single-turn large language model (LLM) assistants to autonomous multi-agent execution meshes speaking the Model Context Protocol (MCP) and Agent-to-Agent (A2A) protocol, traditional perimeter-based access controls fail to prevent confused-deputy privilege escalation, batch-array policy bypass, and non-repudiable audit gaps. Building directly upon the foundational Zero Trust Architecture principles established in Durga (2025, DOI: 10.38124/ijsrmt.v4i12.1050) and the multi-agent coordination taxonomies formalized in Durga (2025, DOIs: 10.38124/ijsrmt.v4i11.1049, 10.38124/ijsrmt.v4i10.1048, 10.38124/ijsrmt.v4i9.1047, and 10.5281/zenodo.23723284), this technical report specifies and benchmarks three production enforcement invariants implemented across the OWASP Agent Control Standard (ACS) and the AgentTrust open specification: (1) per-element JSON-RPC 2.0 batch decomposition with deterministic fail-closed semantics; (2) cryptographic monotonic capability attenuation across transitive delegation hops; and (3) RFC 8785 JSON Canonicalization Scheme (JCS) audit receipts mapped to Open Cybersecurity Schema Framework (OCSF v1.3.0) provenance records.