feat: interactive MCP tool configuration in hermes tools

[teknium1]

Summary

Adds the ability to selectively enable/disable individual MCP server tools through the interactive hermes tools TUI.

Problem

Users could configure MCP tool filters via:

• CLI commands: hermes tools disable github:create_issue
• Manual config editing: mcp_servers.<name>.tools.exclude

But the interactive hermes tools curses TUI only showed built-in toolsets. Users had no way to browse available MCP tools or toggle them visually — they had to already know the tool names.

Solution

tools/mcp_tool.py — New probe_mcp_server_tools() function:

• Temporarily connects to configured MCP servers
• Discovers tool names and descriptions via the MCP protocol
• Disconnects cleanly — no registry side effects
• Returns {server_name: [(tool_name, description), ...]}

hermes_cli/tools_config.py — New "Configure MCP tools" menu option:

• Appears in the interactive menu when MCP servers are configured
• Probes servers with progress feedback
• Shows a per-server curses checklist with tool descriptions (truncated to 70 chars)
• Pre-selects tools based on existing include/exclude config
• Writes changes back as tools.exclude entries
• Reports which servers failed to connect

UX Flow

hermes tools → Select an option:
  1. Configure CLI (15/17 enabled)
  2. Configure Telegram (12/17 enabled)
  3. Reconfigure an existing tool's provider or API key
  4. Configure MCP tools     ← NEW
  5. Done

When "Configure MCP tools" is selected:

1. Shows "Discovering tools from MCP servers..."
2. Connects to each enabled server
3. For each server, shows a curses checklist:

MCP Server: github  (8 tools)
  ↑↓ navigate  SPACE toggle  ENTER confirm  ESC cancel
  → [✓] create_issue  (Create a new GitHub issue)
    [✓] search_repositories  (Search for GitHub repositories)
    [ ] delete_repository  (Permanently delete a repository)

4. Saves selections to config.yaml

Tests

22 new tests covering:

• Probe function: empty config, disabled servers, failed connections, missing descriptions, cleanup on failure
• Interactive flow: pre-selection from exclude/include lists, description truncation, multi-server handling, cancel behavior, mode switching (include→exclude)

Existing behavior preserved

The CLI commands (hermes tools enable/disable server:tool) and the hermes tools list output continue to work unchanged.