Strong foundation with complete schemas, clear descriptions, and proper tool annotations. All 8 tools have explicit registrations with Zod schemas and descriptions. Naming follows verb_noun convention (get_, list_, summarize_). Parameter descriptions are present and mostly actionable. Key strengths: enum constraints on stream keys, Unix timestamp documentation, pagination support. Weaknesses: descriptions are terse (avg ~80 chars, below 194-char baseline); some parameter descriptions lack format/range details; no output schema documentation; error handling is generic (catch-all with JSON.stringify).

• Expand tool descriptions to 100-200 chars. Add WHEN/WHY context: 'Get the authenticated athlete's profile. Call this first to retrieve the athlete ID needed for other tools, or to display the user's name and stats in the chat.'
• Document output schemas in tool descriptions or as a separate schema field. E.g., 'Returns: {id, username, firstname, lastname, city, state, country, profile_medium, profile, friend, follower, created_at, updated_at, badge_type_id, weight, resource_state}' or link to Strava API docs.
• Enhance error messages with recovery hints. E.g., catch activity_id validation errors and return 'Invalid activity ID format. Activity IDs must be numeric strings. Call strava_list_activities() to find valid activity IDs.'
• Add format/range details to parameter descriptions. E.g., 'after: Unix timestamp in seconds (e.g., 1609459200 for 2021-01-01). Must be before the "before" parameter if both are provided.'
• Consider migrating from STDIO to HTTP+SSE or Streamable HTTP transport to enable remote client access and hosted deployment.