[BUG] Command names are inconsistent

### Describe the bug

In the default namespace mode command names are inconsistent across tools. This makes it difficult for the LM to guess command names based on an established pattern. E.g., `acr_registry_list` vs. `sql_db_get` vs. `appservice_webapp_get`.

### Expected behavior

1. Command names use consistent terminology (e.g. `get` vs. `list`).
2. Command names should not start with the tool name. E.g. we should have `webapp_get` instead of `appservice_webapp_get`).

### Actual behavior

The inconsistency makes it difficult for the LM to guess a command name even when it knows exactly what it wants to do. For the azure-appservice tool I've seen it try all of the following before `appservice_webapp_get`:

> webapp get, webapp list, webapp_get, webapp_list, webapp_show, show, get, app_list, app_show, plan_list, plan_get, appserviceplan get, appserviceplan_get, config_get, appservice_get, webapp_config_appsettings_get

It ends up burning a lot of tokens and time trying to hit on the right command rather than doing useful work.

### Reproduction Steps

Ask Copilot to "get App Service details for ".

### Environment

_No response_