MCP Integrations Need Contracts, Not Assumptions

Understand the protocol boundary

The Model Context Protocol describes primitives such as prompts, resources, and tools for connecting an AI application to contextual data and executable functions. The protocol helps make those capabilities discoverable and structured. It does not decide whether a particular operation is safe, approved, or appropriate for a specific user and situation.

That distinction matters when a tool can change data, initiate a transaction, or affect an external system. A well-described input schema can prevent malformed requests, but it cannot replace policy, user intent, scoped approval, or evidence about the outcome. Those concerns belong in the application and its operating controls.

• Treat tool discovery as capability information, not permission.
• Describe inputs, outputs, errors, and side effects explicitly.
• Keep authorization and approval checks outside model preference alone.

Build a contract around the tool

A useful integration contract names the actor, action, resource, required context, and possible results. It distinguishes a validation error from a denied request, an accepted request from a completed side effect, and a known outcome from an unknown outcome. These distinctions let a client present honest states instead of treating every response as success.

Versioning is part of the contract. A tool schema, its policy assumptions, and its downstream behavior can all change. Clients should be able to detect an incompatible revision or require review rather than silently applying a new meaning to an old workflow.

• Use narrow operations with explicit schemas and result states.
• Record the version and policy context for consequential requests.
• Design reconciliation for timeouts and uncertain outcomes.

Keep capability and authority distinct

Rangoon's public material separates capability composition from execution authority. LNSAT's pre-release source describes exact action packets, scoped approval, one-time authority, receipts, and reconciliation for consequential actions. These are complementary concerns, not proof of a general hosted dispatch service or unrestricted MCP access.

A responsible integration can expose useful context and still require a human or policy decision before action. That is a product choice that protects users and gives teams a clearer audit trail.