This server has 3 tools with significant definition quality gaps. Tool names follow verb_noun pattern (getCurrentTime, calculate, storeMemory), which is acceptable. However, descriptions lack depth and actionability. Input schemas are present but incomplete, timezone parameter in getCurrentTime has no 'required' array enforcement, and expression/key/value parameters have minimal type specificity. Critically, NO OUTPUT SCHEMAS are documented anywhere in the code, violating the requirement that 'tools returning lists should document output schema.' The tool descriptions are generic and do not explain WHEN to use each tool vs alternatives, dependencies, or consequences (especially storeMemory, which is stateful). Error handling is minimal, tools throw generic exceptions without recovery guidance. Parameters lack constraints (no regex patterns, ranges, or enums). This is a typical D-tier server with functional but poorly-engineered tool definitions.

• Add non-empty output schema documentation for each tool. Example for getCurrentTime: { type: 'object', properties: { iso8601: { type: 'string', description: 'ISO 8601 datetime string' }, unix_timestamp: { type: 'number' }, timezone: { type: 'string' } }, required: ['iso8601', 'timezone'] }
• Expand tool descriptions to 50-200 chars, following: WHAT does it do? WHEN to use it? WHAT does it return? Example: 'getCurrentTime: Returns current date and time in the specified IANA timezone (e.g., America/New_York, UTC). Use when the user asks for time, timezone conversion, or scheduling. Returns ISO 8601 string and Unix timestamp.'
• Add descriptions and type constraints to all input parameters. Example for timezone: 'IANA timezone string (e.g., UTC, America/New_York, Europe/London). If invalid, the tool will suggest valid timezones.'
• For calculate tool, document the expression format in parameter description: 'Mathematical expression using +, -, *, /, and parentheses (e.g., "2 + 2 * 3"). Max 100 characters. Returns numeric result.'
• For storeMemory, add state-management guidance: 'Stores key-value pairs in session memory. Persists for the duration of the conversation. Retrieve with getMemory tool. Keys are case-sensitive strings, max 50 chars. Values are max 1000 chars.'
• Add a fourth tool: getMemory(key: string) -> { value: string } to support read-write balance and enable LLMs to verify stored state.
• Implement error classification and recovery hints. If calculate fails, return: 'Invalid expression: got "2 + + 3", operators must have operands on both sides. Try again with a valid expression.' Not 'Error: SyntaxError'.

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

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