MCP integrations give AI assistants a standard way to discover and call application tools. As assistants become more capable of acting across apps, the integration work increasingly includes permissions, failure handling, and a clear account of what changed.

The MCP project's authorization guide describes OAuth-based authorization for remote HTTP servers, while explaining that local servers can obtain credentials through other mechanisms. That distinction helps explain why an integration that works in one client may require additional setup in another. Read the MCP authorization guide.

Consider a blog assistant that can read drafts and schedule articles. Here is a suggested way to design and evaluate that integration.

Separate reachability from permission

An endpoint can be reachable and still reject a client. A successful HTTP connection proves that the request arrived; it does not prove that authentication, protocol initialization, or tool discovery succeeded.

Debug those stages separately. Record the status code and operation without logging credentials. Check whether the client reached the intended route, whether it presented a supported credential, and whether the server returned the expected protocol response.

The MCP guide describes how protected resource metadata helps a client discover the authorization server. It also stresses validating tokens rather than accepting a token simply because one was supplied.

Give tools a bounded purpose

For a blog, tools such as get_post, create_draft, and schedule_post are easier to reason about than an unrestricted database execution tool.

Each operation should have clear inputs and a result that describes the resulting state. A schedule response should include the post identifier, publication time with its offset, and whether the post is currently hidden or live.

Ambiguous booleans create avoidable confusion. A system might mark a scheduled article as “published” internally while keeping it invisible until a later timestamp. Return the meaningful status to the assistant so it can explain the result accurately.

Treat retries as part of the design

Suppose a create request succeeds but the network disconnects before the client receives the response. Repeating the request might create a second article.

A useful design is to accept an idempotency key for creation or support looking up the intended item by a stable identifier before retrying. For updates, a version check can help prevent overwriting a newer edit.

These are application design recommendations: adopting MCP alone does not add those guarantees.

Verify the whole workflow

A focused integration check should cover discovering tools, reading a known item, creating a test draft, and reading it back. Use a controlled test item and explicitly verify any cleanup.

For scheduling, compare the stored timestamp with the requested timezone and confirm the article's status. “Request completed” is weaker evidence than “this exact post is scheduled for this exact time.”

The architectural principle is familiar: keep transport handling separate from application rules. Readers building mobile clients can see the same separation in Clean Architecture for Android. A dependable integration makes its boundaries and outcomes easy to inspect.