Each tool has a clearly distinct purpose with no overlap: a2a_server_registry manages server URLs, call_agent invokes a specific agent, and list_agents retrieves agent information. The descriptions clearly differentiate between server management, agent invocation, and agent listing functions.

The tools follow a consistent snake_case naming convention throughout. However, the naming pattern is mixed: a2a_server_registry uses a prefix+noun+noun structure, while call_agent and list_agents use verb+noun. This minor deviation prevents a perfect score.

With only 3 tools, the server feels somewhat thin for an A2A (Agent-to-Agent) server that presumably facilitates multi-agent interactions. While the tools cover basic operations (registry management, agent calling, and listing), the scope suggests more functionality could be expected, such as agent configuration or monitoring tools.

The tools provide core operations for server registration and agent interaction, but there are notable gaps. For example, there's no way to update server details, manage agent states beyond listing, or handle error scenarios explicitly. The surface covers basic workflows but lacks comprehensive lifecycle management for the domain.