This MCP proxy server exposes 10 tools that forward requests to a remote MCP server. While tool names follow verb_noun conventions and descriptions are present, there are critical gaps: (1) Most tools lack input schemas entirely or have only partial schemas; (2) Parameter descriptions are minimal (typically 5-15 chars), well below the 72-char baseline; (3) Output schemas are undocumented, callers cannot know what fields to expect; (4) Error handling is minimal, with only one tool (_call_tool) catching exceptions; (5) Tool definitions are inferred from request handlers rather than explicitly registered with full metadata. The proxy pattern itself is sound, but the tool interface lacks the polish needed for reliable agent composition.

• Document the output schema for every tool. For proxy tools, infer the remote MCP server's response structure and document it explicitly (e.g., '_list_prompts returns {prompts: [{name: string, description?: string}], _meta: {...}}').
• Expand parameter descriptions to 50-150 characters. Instead of 'The URI of the resource to read', write 'The full URI of the resource to read (e.g., file:///home/user/data.txt). Must match a URI returned by _list_resources(). If URI is invalid, the server will return a 404 with available resource options.'
• Add try-catch to all 9 non-handled tools. When a remote MCP call fails, catch the exception and return a structured error: {content: [{type: 'text', text: 'Could not list prompts from remote server: {error_detail}. If the remote server is unreachable, check connectivity.'}], isError: true}.
• Add pagination to _list_prompts, _list_resources, _list_tools. Accept limit (default 20, max 100) and cursor parameters. Return results + next_cursor + total count so agents can page through large result sets without exhausting context.
• For _get_prompt and _call_tool, document the expected structure of 'arguments'. Instead of type: object, provide an example or enum of known argument keys. If arguments are remote-server-specific, state: 'Arguments depend on the selected prompt/tool from the remote server. Call _list_prompts() or _list_tools() first to discover valid argument keys.'
• Add an explicit tool registry or schema document that lists all 10 tools with full metadata (name, description, input schema, output schema, required params, error codes) so clients can introspect without calling the server.

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

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