"and the one they're using." no it's not.

Agents are just making REST calls and that's it.

The best thing a company can do to make their stuff 'agent ready' is to make sure the lllm.txt docs are clear-cut and ready for the AI with clear instructions for agentic use.

'MCP' is frankly a hurdle.

Now - it probably does make sense to add MCP, because it's not expensive at all, and some will like that use case, it maybe garners a bit more attention .

MCP is a 'weak externalization' - people are using it because others are using it, and it's a 'workable' but 'not strong' solution.

It could very well entrench itself however.