Looked at the logs for a client's MCP server last week. Seven tools registered. One of them was getting called in nine sessions out of ten. The other six might as well not have been there.
They knew all seven existed. They'd written all seven. What they couldn't see was that six of them were sitting idle.
This surprised me, and then it stopped surprising me. You build a surface for agents to use. You ship it. And then you can't watch the thing you built being used.
A website owner has done this for twenty years. Which pages get visited, where people leave, what nobody clicks. Open the analytics, read the chart, get on with your day.
On an MCP server there's no chart. There are logs, if you wired them up. The same story is in there, one tool doing the work and six gathering dust, but nobody reads logs that way. Reading them that way is a job on its own.
So the six tools stay. Some are probably fine and just need a clearer description. Some an agent will never reach for, and you'd want to know that before you spend another week maintaining them.
Asked the client which of the six they'd drop if they had to choose. They didn't know. Fair enough. Nobody had ever shown them.
That last bit is the part worth fixing.
If you build a surface that agents use, and you want to know how they actually use it, Vesta is in early access.