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• ADD IMMEDIATE: Tool definitions with explicit JSON Schema for ALL parameters. Each tool must declare inputSchema with type, description, required fields, and constraints (enums, patterns, min/max).
• ADD IMMEDIATE: Non-empty descriptions for every tool (50-200 chars). State WHAT the tool does, WHEN to call it, and WHAT it returns. Example: 'Create a new advertising campaign with targeting and budget settings. Returns campaign_id for use in other tools.'
• ADD IMMEDIATE: Parameter documentation for every input. Include expected format, valid values, and constraints. Example: 'campaign_id (string): The Meta campaign identifier (e.g., abc123def456). Get from list_campaigns().'
• FIX SECURITY: Move OAuth tokens and API secrets to server-side injection. Do NOT expose META_APP_SECRET, META_ACCESS_TOKEN, or tokens as tool parameters. Use environment variables or a secure vault accessed only by the server.
• ADD: Output schema documentation for each tool. Specify what fields are returned, their types, and which IDs are safe to pass to downstream tools. Example: 'Returns { campaign_id, name, status, budget, created_at }'.
• ADD: Pagination for list_* tools. Implement limit (1-100, default 20), offset, and total_count. Cap results at 50 items per call to avoid context explosion.
• ADD: Error classification and recovery guidance. Wrap errors in a structured format: { error_code, message, recovery_action }. Example: { error_code: 'NOT_FOUND', message: 'Campaign abc123 not found', recovery_action: 'Call list_campaigns() to find valid campaign_ids' }.