Server has 4 tools with explicit Zod schemas and descriptions. However, critical gaps limit production readiness: (1) Parameter descriptions are sparse, 'name' in addContact lacks description entirely; (2) Tool descriptions are generic and lack context on when/why to use each tool or what happens on failure; (3) No error handling guidance, tools throw raw errors without recovery hints; (4) rickRoll is a destructive/irreversible operation with no confirmation pattern or dry-run; (5) Output schemas are implicit (MCP text content) but not documented for the agent; (6) No pagination, rate limiting, or result limits despite contact storage. Naming is clear (verb_noun pattern) and schemas are present, but descriptions fall short of the 50-200 char LLM-optimized baseline.

• Add description to addContact 'name' parameter: 'The contact's full name (e.g., John Doe). Used as the lookup key.'
• Expand rickRoll description to include side effects and confirmation: 'Calls a person and plays a rick roll audio. This is irreversible and will ring their phone. Requires explicit confirmation before execution.'
• Add recovery hints to tool descriptions. E.g., sendMessage: 'If you do not have the phone number, call findPhoneNumberByName() first. Returns error if number is invalid or service is unavailable.'
• Implement a confirmation pattern for rickRoll: add a 'confirm_rickroll' tool that returns a confirmation token, then rickRoll accepts that token to prevent accidental invocation.
• Document output schemas explicitly. E.g., 'Returns {success: boolean, message: string, contact?: {name, phoneNumber}}' so agents know what fields to expect.