A particular plugins (built-in and loadable) capacitiy limit depends on access limits of the monitored service or implementation specifics. In other words a plugin for one of the reasons described before can only be able to execute X (replace with any natural number) item requests in parallel.

This is a hard limit set by the plugin and agent 2 should respect it.

Update loadable plugins register response to allow sending a max capacity limit set by the plugin. If max value is not set by plugin, a default value defined in agent 2 should be used.

Update SDK to allow setting the max allowed capacity value for build in plugins and loadable ones.

In Agent 2 update capacity handling logic to take the per-plugin max allowed capacity into account. Lowering capacity setting of a plugin if the per-plugin max allowed capacity exceeds the configured value or default capacity value for all plugins, WARN logging it.