A Swift-based MCP server built with Hummingbird framework, providing tool execution, resource management, and streaming capabilities
Single tool with critically underdeveloped definition. MyTool1 has only a generic, unhelpful description (28 chars: 'Something something, tool, something something'). Parameter schema is present but description is minimal. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Tool appears read-only by design but this is not reflected in metadata. No error handling guidance, no output schema documentation, no examples of when/why to call this tool. The description fails the 20-character minimum threshold and reads like placeholder text. The codebase shows HTTP transport and basic MCP integration, but the tool definition quality is far below production baseline.
Something something, tool, something something
Tool description is placeholder text and fails minimum clarity threshold. '28 characters: 'Something something, tool, something something' violates the 50-200 character baseline for LLM-optimized descriptions and provides zero semantic value for tool selection or usage guidance.
Tool name 'MyTool1' is generic placeholder. Does not start with action verb (get_, create_, update_, delete_, search_, list_, send_) and fails to convey what the tool does. Violates verb_noun naming convention critical for LLM intent inference.
No output schema documented. Tool returns TextContent but no field structure, constraints, or data contracts are specified. LLMs cannot plan downstream tool chains or extract structured data from freetext responses.
Missing tool annotations. Tool is read-only (param is input-only, no destructive side effects visible in code), but no readOnlyHint, destructiveHint, or idempotentHint metadata present. This forces LLMs to reason about tool safety without explicit guidance.
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | F | 40 | <=2025-11-25 | v2 |
Parameter 'param1' description is minimal ('An example parameter') and fails to state expected format, constraints, or purpose. LLMs cannot infer what value to pass or validate input independently.
No error handling or recovery guidance. Code throws MCPError but provides no actionable next steps for LLM when invocation fails. Stack traces and error codes are opaque to reasoning.
Tool implementation uses hardcoded 3-second sleep delays (3x Task.sleep calls) with no clear purpose. Code suggests test/placeholder status rather than production-ready tool. Introduces gratuitous latency and no business value.