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MCP makes tool use interoperable. It does not, by itself, give you a portable record of what happened after a tool call crosses a system boundary.
That gap shows up quickly in real deployments. Server logs help the operator debug. Traces help inside one stack. But if a customer, partner, auditor, or downstream system needs to verify a tool result later, those artifacts usually do not travel well.
This talk shows a practical pattern for adding portable signed records to MCP tool calls without changing MCP itself. I will walk through where the record fits, what should be signed, how to carry it with a tool result, how offline verification works, and how this complements existing auth, tracing, and policy systems instead of trying to replace them.
Attendees will leave with a clear implementation pattern they can use in their own MCP servers and gateways: issue, carry, verify, and reason about signed records for tool calls.
Jithin Raj is the lead protocol maintainer of PEAC Protocol and founder of Originary. He works on portable signed records for APIs, MCP servers, and agent workflows.
