UML-MCP (antoinebou12/uml-mcp) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: we have no way to read this server ourselves. No publisher has claimed this listing.
UML-MCP Server is a UML diagram generation tool based on MCP (Model Context Protocol), which can help users generate various types of UML diagrams through natural language description or directly writing PlantUML and Mermaid and Kroki
Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
Limited view: static analysis for Python is partially covered.
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antoinebou12
Source: mcp.so · also listed on Glama
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MCP_MAX_CODE_LENGTHMax diagram code length 500000TESTINGKROKI_SERVERKroki server URL https://kroki.ioUSE_REAL_FASTMCPDEVELOPMENTMOCK_FASTMCPAGENT_DISCOVERY_BASE_URLUML_MCP_STDIO_UILIST_TOOLSUSE_LOCAL_KROKIUse local Kroki instance falseMCP_DIAGRAM_FALLBACKMCP_MEMORY_ONLYMCP_URL_ONLYVERCELMCP_OUTPUT_DIRDiagram output directory ./outputUML_MCP_OUTPUT_DIRMCP_MAX_RENDER_SECONDSMCP_BATCH_MAX_ITEMSgenerate_uml_batch Multiple diagrams in one call (cap: )MCP_RATE_LIMIT_PER_MINUTEHTTP rate limit per IP for diagram/MCP routes (0 = off) 0USE_LOCAL_PLANTUMLUse local PlantUML instance falseTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
5/5 tools missing one or more hints — list_diagram_types (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); generate_uml_batch (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); generate_uml (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +2 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
4/5 tool handlers declare input schemas (80%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 1/5 tool handlers wrap calls in try/catch (20%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
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