You added a skill last Tuesday. The agent hasn't called it once. Each new skill silently weakens the discovery odds of the ones you already have.
You assume it's a description problem. It isn't.
Everyone's pushing past 50 skills now. Vercel ships a plugin with 40. Google's gws brings 95. I do it too. My local registry is at 38.
Each one I added lowered the odds that the others get reached when I need them.