Prevent servers without tools from being added/running #173
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This PR addresses issue #108 by ensuring MCP servers always have at least one tool configured, preventing useless server configurations that cannot function.
Previously, servers could be added or modified to have zero/no tools, resulting in non-functional configurations that would run but provide no capabilities.
This could happen through:
.mcpd.tomlto remove all toolsmcpd config tools removeto remove all tools from a serverValidation:
mcpd add) - Prevents adding servers without toolsmcpd daemon) - Validates on startup and reload, exits if any servers lack toolsmcpd config tools remove) - Prevents removing the last tool, guides users to usemcpd removeinsteadUpdated docs on hot reload to mention the edge case.
Closes: #108