Four tools with schemas present but significant quality gaps. Tool names lack clear action verbs (jena_sparql, jena_source_records, jena_graph, jena_admin are vague about intent). Descriptions exist but are brief (34-194 chars) and lack LLM-optimized guidance on WHEN to use each tool vs. alternatives. Parameters have types and defaults but many lack descriptions or constraints. jena_admin's 'params_json' is a red flag, free-form JSON forces LLMs to construct complex payloads without schema validation. No output schemas documented. Error handling and recovery guidance absent. Security concerns: jena_sparql and jena_graph expose WRITE/DESTRUCTIVE operations without confirmation or dry-run patterns.

• Rename tools with clear action verbs: 'execute_sparql_query', 'execute_sparql_update', 'get_rdf_graph', 'put_rdf_graph', 'delete_rdf_graph', 'list_datasets', 'create_dataset', 'delete_dataset', 'get_server_stats', 'backup_dataset', 'compact_dataset'. Separate admin actions into individual tools.
• Replace 'params_json' with typed parameters. For jena_admin, create separate tools: 'list_datasets', 'create_dataset(name, db_type)', 'delete_dataset(name)', 'get_dataset_stats(dataset)', 'backup_dataset(dataset, path)', 'compact_dataset(dataset)'. Each tool has a single, clear responsibility.
• Document output schemas for all tools. E.g., jena_sparql returns {results: [{bindings: {var: value}}], head: {vars: []}}, jena_graph returns {graph: string, content_type: string}. Include field descriptions so LLMs know what to extract.
• Add confirmation/dry-run pattern for destructive operations. E.g., jena_sparql UPDATE accepts 'dry_run: bool' parameter; returns 'would_delete: N triples, would_insert: M triples' without executing. Requires explicit 'confirm: true' to commit.
• Enhance parameter descriptions with format, range, and enum constraints. E.g., 'accept' → 'MIME type for results: application/sparql-results+json, text/turtle, application/rdf+xml, text/csv, text/tsv'. 'action' → enum ['query', 'update']. 'graph' → 'Named graph URI (e.g., http://example.org/graph) or "default" for the default graph'.