Single tool 'dify_app_tool' has a basic description (89 chars) and partial input schema. The schema defines 'query' and 'arguments' parameters with types and descriptions, meeting minimum requirements. However, the tool lacks output schema documentation, error handling guidance, and parameter constraints. The description does not explain when to use this tool vs alternatives, what the return format is, or how to handle failures. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) are present. The naming 'dify_app_tool' is generic and does not follow verb_noun convention (should be 'invoke_dify_app' or 'call_dify_app'). Overall, this is a minimal, underdeveloped tool definition.

• Rename tool to 'invoke_dify_app' or 'call_dify_app' to follow verb_noun convention and clarify intent.
• Expand description to 150-250 chars: explain that it invokes Dify chat or workflow applications, returns text output, and when to use it (e.g., 'Call this to execute a Dify chat or workflow app with custom inputs and retrieve the result as text.').
• Document output schema explicitly: {type: 'text', text: string} or {type: 'error', message: string}.
• Add constraints to 'arguments' parameter: document expected keys based on app type (chat vs workflow) or reference Dify app input schema. Consider splitting into separate 'chat_arguments' and 'workflow_arguments' if structures differ.
• Add error handling guidance: 'If app_id is invalid, verify it in Dify settings. If timeout occurs (>120s), retry with simpler inputs. If arguments are malformed, check Dify app input schema.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry