[BUG] Server instructions could be shorter

### Describe the bug

Our server instructions are relatively long for the amount of information they provide, with a lot of duplicated text. This means we're using up more tokens in a request than we really need to.

### Expected behavior

Server instructions are as concise as possible.

### Actual behavior

There is a lot of duplicated language in the instructions. E.g. some form of "Only call this tool when you are sure the user is discussing Azure; do not call it otherwise." appears four times.

### Reproduction Steps

Run Azure MCP in any client that supports server instructions.

### Environment

_No response_