Question

When multiple MCP servers are connected to a single host, how are resource naming collisions resolved to ensure the LLM invokes the correct tool?

Accepted Answer

When multiple Model Context Protocol servers are connected to a single host, resource naming collisions are resolved through the implementation of hierarchical namespace prefixes. Every MCP server is assigned a unique identifier or alias by the host during the connection process. When a tool is exposed by a server, the host automatically modifies the tool name by prepending the server alias followed by a separator, typically a slash or colon, such as server-name/tool-name. This process creates a fully qualified name that guarantees uniqueness across the entire host environment. The LLM interacts with these fully qualified names, ensuring that when it requests a specific action, the host can unambiguously route the request to the correct server. If two different servers provide a tool with the same base name, the distinct prefixes distinguish them, preventing the LLM from confusing one service for another. The host maintains a mapping table that links these qualified names back to the specific server instance and its original internal tool definition, facilitating accurate execution.

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When multiple MCP servers are connected to a single host, how are resource naming collisions resolved to ensure the LLM invokes the correct tool?