Tools should be conditionally available based on connection state and LSP server capabilities

[linw1995]

Problem

Currently, all MCP tools are available immediately upon server initialization, regardless of:

• Whether a Neovim connection is established
• Whether the connected LSP server supports required capabilities

This causes:

• Unnecessary token usage when tools requiring connections are called prematurely
• Failed operations when LSP tools are invoked on servers lacking required capabilities

Solution

Implement dynamic tool availability using MCP's tool list change notifications:

1. Connection-aware tools: Only make tools requiring connections available after a successful Neovim connection is established
2. LSP capability validation: Only make LSP tools available after verifying the connected LSP server supports the required capabilities
3. Dynamic updates: Use MCP's tool list change notifications to update available tools as connection state and capabilities change

Implementation approach

• Track connection state and LSP server capabilities
• Filter tool availability based on current state
• Send notifications when availability changes
• Update tool descriptors to include connection/capability requirements

This would eliminate wasted tokens and provide better user experience by only showing tools that can actually succeed.