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Re:MCP Explained by nater5000 on Thursday November 05, 2026 @09:30AM (#50379528)
This is too dense. You might as well just post some Python code with sufficient comments to get the same point across. I think a nicely written article with a few diagrams would go a long way. Sometimes less is more.

MCPs don't really need this level of technical explanations (it's basically just a REST API with standardized endpoints for discovery aimed at agents), and AI agents really do lack in the taste dimension when it comes to these things.

Re:MCP Explained by jrmg on Thursday November 05, 2026 @09:35AM (#50379584)
Yeah, this feels like one of those ‘explainers’ that feel like they are great to someone who already knows how the system works, but don’t actually work for newbies because they tacitly assume knowledge of the shape of the system that seems ‘obvious’ to someone steeped in it.
Re:MCP Explained by bityard on Thursday November 05, 2026 @11:04AM (#50380852)
This is a problem with most docs I encounter. _Good_ documentation should also teach the user how to use the thing, not simply end up as glorified out-of-band code comments.
Re:MCP Explained by Geezus_42 on Thursday November 05, 2026 @11:12AM (#50380932)
I found that it's a mistake I would often make when writing documentation about something I deeply understand. I forget the questions that led me to that understanding. Now I make a conscious effort to think about the knowledge of the intended audience. I still miss things, but that's why it's good to have other people review.
Re:MCP Explained by ep103 on Thursday November 05, 2026 @03:38PM (#50384168)
Good documentation requires understanding who your audience will be, and what the lifecycle of the documentation itself will be.

Engineers rarely consider either, and doing both requires significant work

Re:MCP Explained by adolph on Thursday November 05, 2026 @03:54PM (#50384342)
The language of explaining is often different from the language of training (from Vervake). See also https://diataxis.fr/
Re:MCP Explained by SOLAR_FIELDS on Friday November 06, 2026 @01:40AM (#50388966)
I wish all technical documentation started from first principles when walking up to a concept. The world would be a better place for it.
Re:MCP Explained by dawnerd on Friday November 06, 2026 @02:50AM (#50389380)
Documentation has gotten so very bad thanks to AI. Outright unusable in most cases.
Re:MCP Explained by dspillett on Friday November 06, 2026 @06:00AM (#50390813)
Bad documentation has been out there for as long as I can remember. The problem AI seems to be adding is the expectation of “just ask an AI” which is removing the drive to write even bad documentation and expecting the AI to derive answers from code and API references.

No MS, I don't want to ask co-pilot. Why don't you get co-pilot to draft some good documentation, that you then review and edit to make sure it is accurate, instead of expecting every individual to ask an AI for every question they have? That would be a lot more efficient in terms of energy use, I expect.

Re:MCP Explained by dspillett on Friday November 06, 2026 @05:53AM (#50390767)
> This is a problem with most docs I encounter.

Most documentation is reference documentation, which as you find it not very useful for just starting out (it assumes at least a small base of knowledge about what it is documenting).

> _Good_ documentation should also teach the user how to use the thing

Good documentation usually comes in at least two parts: guide/introduction and reference. This is how some of the better ORA books were written, back when dead trees on shelves were a key source of learning for programmers - three sections: a small one for absolute basics (what you need to know before starting, many could skip this), the second an introduction to the concepts of the new thing (language, library, server, etc.), typically with worked examples, and at least the last half of the pages being reference material (split into meaningful subdivisions where that is useful). Sometimes they would split this in two and there would be explicit introduction and reference works (under the banner “complete reference”, though these would have a little introductory text in them too) for the same subject, but not always.

When you try to merge the two (guide and reference) too closely it all too often ends up either too basic or irritatingly long-winded for the experienced readers, while still being too opaque for those who are starting from scratch.

Sometimes a single good README is all that is needed for the guide part, sometimes you need that with branches (links) off to longer introductions to specific parts, it depends on the size of the project.

Re:MCP Explained by palata on Friday November 06, 2026 @08:31AM (#50392077)
There is a big difference, IMHO, between an "explainer" and "documentation".

For an article explaining a concept, it's a balance to find, and it depends on the target public. If every physics publication started by teaching physics to the reader, it just wouldn't work, would it?

Regarding documentation: we probably all agree that a code repository should NOT explain how programming works: if you don't understand C++, then a C++ codebase is not for you.

But should the README explain how to, e.g. run CMake? I would agree it shouldn't. Just like it shouldn't explain how to clone the git repository, or start the computer.

This said, I find this particular explainer about MCP... convoluted.

Re:MCP Explained by ex-aws-dude on Thursday November 05, 2026 @05:30PM (#50385424)
That's why its better for the person who just learned something to write the docs (checked by the expert though obvs)
Re:MCP Explained by 4L3XV33 on Friday November 06, 2026 @12:15AM (#50388487)
Instructive feedback - been on both sides of that experience but never heard that problem so clearly defined before.
Re:MCP Explained by ozim on Friday November 06, 2026 @02:55AM (#50389416)
For me this one looks like someone prompted: “I want to have a cool looking explainer in form of a website and make it about hot topic”.

I don’t like people pointing out AI slop but one looks like something that should be called out. Maybe it helps the author for self learning that’s cool, but it doesn’t look like something for sharing with people as it really only wastes time.

Re:MCP Explained by dingaling911 on Thursday November 05, 2026 @10:08AM (#50380038)
It's literally JSON-RPC I'm not sure why you say it's a REST API. It's not even close to a REST API.
Re:MCP Explained by WhitneyLand on Thursday November 05, 2026 @10:32AM (#50380387)
In this context/application I see a lot of similarities.

They both provide stateless RPC methods and human readable metadata that makes them easy to route.

You could ask why json-rpc was even necessary for 2.0. I think mostly just for stdio and backwards compatibility.

Re:MCP Explained by dingaling911 on Thursday November 05, 2026 @10:49AM (#50380618)
In the venn diagram of MCP and REST, there is an (optional) overlap for sure but one does not subsume the other.
Re:MCP Explained by BerislavLopac on Friday November 06, 2026 @04:45AM (#50390273)
REST is explicitly not RPC.
Re:MCP Explained by WhitneyLand on Thursday November 05, 2026 @10:19AM (#50380195)
To me the writing itself seems pretty economical.

From your comment, I expected to be annoyed by a bunch of slop or obscurities.

My guess is the writing did not come straight out of an LLM and was carefully curated.

If I’m wrong I’d love to have the style prompt.

Re:MCP Explained by Aurornis on Thursday November 05, 2026 @11:15AM (#50380966)
> it's basically just a REST API

The opening has 1 paragraph and 5 table entries. One of them is “Not REST”

It’s a little scary that this was considered too dense or complex because the basics were explained in something that could be read in 1 minute. That still wasn’t enough to stop the top HN comment (as I write this) from calling it too dense and giving incorrect information that is immediately refuted by skimming the top part of the article.

Re:MCP Explained by sharifhsn on Thursday November 05, 2026 @11:20AM (#50381024)
It is not technically REST, but it is basically REST. The alternative to a server endpoint is JSON-RPC over stdin which has the same request/response format as REST. This is exactly the point about over-complicating it by saying "it's not REST, it's not JSON-RPC". It's a JSON request/response protocol with a defined format.
Re:MCP Explained by jazzypants on Thursday November 05, 2026 @12:24PM (#50381767)
Re:MCP Explained by krackers on Thursday November 05, 2026 @11:50PM (#50388371)
[delayed]
Re:MCP Explained by jazzypants on Friday November 06, 2026 @08:25AM (#50392021)
Yeah, it's Fielding's Ph.D. thesis where he's expounding on his work on HTTP 1.0 and 1.1. He's literally just explaining how the web works. It's pretty crazy how much people have misinterpreted it.
Re:MCP Explained by tasuki on Thursday November 05, 2026 @12:56PM (#50382137)
> It is not technically REST, but it is basically REST.

What does that even mean?

> the same request/response format as REST

What request/response format does REST have?

Do you even know what HATEOAS means?

Re:MCP Explained by taneq on Thursday November 05, 2026 @11:26AM (#50381109)
While we’re applauding brevity, three cheers for the first line being “model context protocol”. While yes, this one is common, it’s still nice not having to scroll through 20 screens of blah to still not find out what the thing is.
Re:MCP Explained by parineum on Thursday November 05, 2026 @11:27AM (#50381120)
That's the purpose of the comment, to make a comparison that's simpler than the article that is missing from the article.

If the article said, "It's basically just REST". There'd be no need to comment as such.

Re:MCP Explained by iugtmkbdfil834 on Thursday November 05, 2026 @11:39AM (#50381261)
Sign of times man. Not that long ago -- on HN mind you -- someone posted an article that landed on main page that used lsblk as some sort of secret hacker linux command.
Re:MCP Explained by wongarsu on Thursday November 05, 2026 @11:57AM (#50381461)
The opening is fine, but when you click "Start the lessons" you get a six-pane interface that imho is pretty overwhelming

Yeah, I can click around and follow what's going on. But I'm with GP: this is not making it easier to understand. It's great at being Hollywood UX: looks pretty, stuff moving everywhere. One click on "step" makes the image animate, and change the text in the left sidebar, top middle, and right sidebar, in addition to stepping the table in the bottom middle. But it's almost the opposite of distilling information

Re:MCP Explained by steve_adams_86 on Thursday November 05, 2026 @01:44PM (#50382788)
> you get a six-pane interface that imho is pretty overwhelming

Agreed, and it probably doesn't need to be overwhelming but the design choices leave the intent and purpose of the UI fairly unclear. It requires a bit of clicking around to understand what it's all for, and it's quite flat and unappealing, leaving little drive to do that work.

Re:MCP Explained by flanz_10 on Thursday November 05, 2026 @12:35PM (#50381906)
> The opening has 1 paragraph and 5 table entries. One of them is “Not REST”

and yet...

Re:MCP Explained by sleepybrett on Thursday November 05, 2026 @01:12PM (#50382324)
This is actually one of the better 'mcp explained' type 'articles' i've read.
Re:MCP Explained by amelius on Thursday November 05, 2026 @11:26AM (#50381110)
> This is too dense.

Maybe it was written for an AI? :)

Or by an AI? Or both?

Re:MCP Explained by rootusrootus on Thursday November 05, 2026 @07:09PM (#50386425)
Looks better now, the author seems to have responded to your criticism. They have made some comments saying as much but they're all dead, maybe a shadowban. I've vouched those comments but anecdotally it seems like it takes way more vouching to unkill a post than it does flagging to kill it.
Re:MCP Explained by privacyishuman on Thursday November 05, 2026 @09:24PM (#50387356)
Depends why they're banned. Sometimes a vouch will fix it straight away. I think detective AI writing is hard to restore with vouches.
Re:MCP Explained by LoganDark on Thursday November 05, 2026 @09:42PM (#50387494)
A lot of flagged comments I vouch seem to only take one vouch. I have a feeling that if it takes more than one vouch, that comment must've been quite flagged, or specifically tripped a detection.
Re:MCP Explained by gnabgib on Thursday November 05, 2026 @09:46PM (#50387519)
It's probably better for the community if you don't vouch GenAI comments.
Re:MCP Explained by slowpacket on Thursday November 05, 2026 @08:19PM (#50386962)
Maybe a playground in a jupyter notebook that you can edit and run some codes can be better?