Four tools with basic descriptions and minimal schemas. Tool names follow verb_noun convention (mux_list, mux_call, mux_find, mux_status), which is good. However, descriptions lack depth on WHEN to use each tool vs alternatives, parameter descriptions are sparse or missing entirely, and output schemas are not documented. mux_call_tool has the most complex logic but its 'arguments' parameter lacks type constraints. No error handling guidance visible. Schemas present but incomplete, most parameters lack descriptions. This is typical D-grade community server work.

• Add output schema documentation for all tools. For mux_list_servers, document: { servers: [{ name: string, status: 'idle'|'active', tools: [{ name, description }] }] }. For mux_call_tool, document: { result: unknown, error?: string, retryable?: boolean }.
• Enhance mux_call_tool 'arguments' parameter: add description 'Arguments object matching the target tool's input schema. If unsure, call mux_find_tool first to inspect the tool's schema.' Consider adding a separate 'validate_only' boolean to dry-run calls.
• Add parameter descriptions to mux_find_tool 'query': 'Search term, tool name, partial name, or keyword. Searches across cached tool names and descriptions. Returns up to 20 results sorted by relevance.'
• Document error scenarios and recovery paths. E.g., 'If mux_call_tool returns "server not found", call mux_list_servers to see available servers. If tool not found, call mux_find_tool to search by name.'
• Expand mux_status description: 'Call this to check gateway health before routing critical calls, or to debug connection issues. Returns uptime (seconds), active connection count, memory usage (MB), cache hit rate (%), and registered server count.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry