The server defines 12 tools with basic schemas and descriptions, but has significant quality gaps. All tools have descriptions (positive), but many lack sufficient detail about when to use them vs. alternatives, what they return, or dependencies. Input schemas are visible and typed, but several parameters lack descriptions or have minimal guidance. The `create_link_token` tool has an empty input schema (`{}`), which is a critical issue. Output schemas are not documented, LLMs cannot predict return structures. Parameters use free-form strings where enums would be appropriate (e.g., direction in enrich_transactions could be an enum INFLOW|OUTFLOW). Descriptions are often under 50 characters, well below the production baseline of 194 chars. Error handling guidance is absent, tools do not explain what to do if an item_id is invalid. No evidence of idempotency hints, confirmation patterns, or recovery guides. Tool composition is reasonable (clear verb_noun naming: get_*, create_*, list_*), but missing output-chaining references (e.g., does create_link_token return something subsequent tools need?). Security is not addressed in tool design (secrets appear to be server-side per the code review, but this is not documented in tool metadata). Overall, this is a functional but minimally polished tool set typical of a community server, not production-grade.

• Add output schemas to all tool definitions. Specify the structure, field types, and meanings of returned data. Example for get_accounts: { type: 'object', properties: { accounts: { type: 'array', items: { type: 'object', properties: { account_id: { type: 'string' }, name: { type: 'string' }, type: { type: 'string' } } } } }
• Fix create_link_token input schema: change from {} to { type: 'object', properties: {} } or add optional properties if configuration is supported.
• Expand tool descriptions to 100 - 200 characters with WHEN guidance. Example: 'get_accounts: Retrieve linked bank accounts for a connected Plaid item. Call this after exchange_public_token to see available accounts before querying transactions or balances.'
• Add parameter descriptions where missing. For direction in enrich_transactions, declare as enum: { type: 'string', enum: ['INFLOW', 'OUTFLOW'], description: '...' }
• Document error cases and recovery paths. E.g., 'If item_id is invalid, you will receive a 404 with message "No access token found for item {item_id}". Call list_items() to see valid item IDs.'
• Add pagination guidance to list tools: specify default limit, max limit, and whether next_cursor or offset-based pagination is supported. Example: 'Returns up to 50 items per page. Use start_date and end_date filters to narrow results.'
• Document tool dependencies and sequencing. Add a tool description note: 'Prerequisite: call create_link_token and exchange_public_token to obtain an item_id. Then call get_accounts with that item_id.'