The Privy MCP server defines 24 tools with generally present input schemas and descriptions, but exhibits inconsistent quality across several dimensions. Naming follows verb_noun convention reasonably well (get_*, create_*, update_*, delete_*, sign_*), but several tools lack clarity on their scope and side effects. Descriptions exist for all tools but many are terse (under 100 chars) and lack guidance on when to use them versus similar tools. Parameter descriptions are present but often generic. Output schemas are completely undocumented, no tool explicitly declares what it returns, forcing LLMs to infer structure from context. High-risk tools like eth_sendTransaction and solana_signAndSendTransaction lack confirmation/dry-run patterns despite being IRREVERSIBLE. Error handling is not visible in the tool definitions themselves. The server provides reasonable foundations but falls short of production-grade quality due to missing output documentation and lack of recovery/confirmation guidance for destructive operations.

• Document output schemas for all 24 tools. For each, specify the return type (object/string/array), field names, types, and what data they contain. Example for get_wallet_details: {type: object, properties: {id: {type: string}, address: {type: string}, chain_type: {type: string}, ...}, required: [id, address]}
• Add confirmation/dry-run support for irreversible operations (eth_sendTransaction, solana_signAndSendTransaction, delete_policy, delete_policy_rule). Implement a 'confirm' parameter or a separate '*_confirm' tool that requires explicit user approval before execution.
• Enhance descriptions for signing tools to explain when to use each: 'personal_sign is for message signing (user authentication); eth_signTransaction is for transaction approval; eth_signTypedData_v4 is for structured data (e.g., permits); secp256k1_sign and raw_sign are for advanced cryptographic operations, use only if you understand the implications.'
• Standardize chain/network parameters. Choose ONE convention (e.g., always 'chain' with enums, or always 'caip2' with CAIP-2 identifiers) and apply consistently. Provide enum documentation or a discover tool that lists valid chain values.
• Add comprehensive parameter descriptions to policy rule tools. Document the 'conditions' array schema (e.g., 'array of condition objects, each with {field: string, operator: enum[eq,neq,gt,lt,...], value: any}'), and 'action' enum values (ALLOW|DENY). Provide an example or link to policy rule reference docs.
• Add error guidance to transaction submission tools. Document retryable errors (nonce conflicts, gas estimation failures) vs fatal errors (invalid recipient, insufficient balance). Provide recovery suggestions.