Three tools with basic schemas and descriptions, but significant gaps in parameter documentation and output schema clarity. Tool names follow verb_noun convention (introspect, execute, explorer), which is good. However, parameter descriptions are minimal (e.g., 'GraphQL query or mutation document' lacks format/constraint guidance), and output schemas are not documented in the visible code. The 'execute' tool accepts a 'variables' object with no type constraints or description of expected structure. Error handling and recovery guidance are absent. No tool annotations (readOnlyHint/destructiveHint) despite clear risk profiles (execute is WRITE, others are READ_ONLY).

• Document output schemas for all three tools. Example for execute: 'Returns {data: object, errors?: array<{message: string, path?: array}>}. data contains the GraphQL response; errors lists any query errors.'
• Add destructiveHint annotation to execute tool and readOnlyHint to introspect/explorer in tool registration (rmcp CallToolResult or tool metadata).
• Expand 'variables' parameter description: 'JSON object mapping variable names to values. Keys must match the operation's variable definitions. Values can be strings, numbers, booleans, arrays, or objects.'
• Add recovery guidance to execute tool description: 'If the query fails, use introspect to validate schema. If the endpoint is unreachable, check network connectivity and endpoint URL configuration.'
• Specify result limits and pagination for introspect if it returns large schemas. E.g., 'Returns up to 1000 types. For large schemas, use targeted introspection queries to avoid context overflow.'

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

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