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Manage VirtualBox and Hyper-V VMs: snapshots, networking, storage, sandboxes, Windows Sandbox
The server defines only ONE tool: vm_agentic_workflow. This tool has critical deficiencies: (1) The tool name violates verb_noun convention, 'vm_agentic_workflow' is a compound noun, not action-oriented. A proper name would be 'execute_vm_workflow' or 'orchestrate_vm_task'. (2) The description references 'Sampling-backed agentic operations' and mentions 'LLM sampling', which indicates the tool is designed to invoke LLM sampling, a deprecated MCP pattern as of 2026-07-28. This is architecturally incorrect for MCP servers. (3) The input schema IS visible and properly typed (action enum, goal string, use_case string, vm_name string), with descriptions present for each parameter. However, the schema itself encodes a multi-action pattern (suggest_config, sandbox_workflow, workflow) that should be split into separate tools per the 'one tool = one thing' pattern. (4) No output schema is documented, the tool description does not state what the tool returns or what fields downstream tools should expect. (5) The description is vague about what each action actually does and when to use each one. 'Autonomous multi-step VM orchestration goal' is too abstract and does not guide LLM tool selection. (6) No error handling guidance, what happens if the VM does not exist? If the workflow fails mid-execution? (7) The tool relies on deprecated sampling pattern, which violates current MCP protocol.
Sampling-backed agentic operations for virtualization. Actions: suggest_config (Suggest VirtualBox VM settings for a use case via LLM sampling), sandbox_workflow (Generate a step-by-step plan for the spin-up → work → snapshot → tear-down safety pattern), workflow (Autonomous multi-step VM orchestration goal).
Tool name is not action-oriented. 'vm_agentic_workflow' is a compound noun. Should be verb_noun like 'execute_vm_workflow', 'orchestrate_vm_task', or 'run_vm_operation'. LLMs infer intent from the verb in the name, this name provides no clear action.
Tool design violates single responsibility principle. The 'action' parameter (enum: suggest_config, sandbox_workflow, workflow) encodes three separate concerns into one tool. Per pattern:tool, split into three separate tools: suggest_vm_config, plan_sandbox_workflow, execute_vm_workflow. Each tool should do exactly one thing.
Tool description mentions 'LLM sampling' and 'Sampling-backed agentic operations'. Server-initiated sampling is DEPRECATED as of MCP spec 2026-07-28. MCP servers should NOT invoke LLM sampling internally. Instead, integrate directly with the LLM provider API outside MCP, or redesign the tool to accept structured input parameters and return structured output for the client to reason about.
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | F | 39 | <=2025-11-25 | v2 |
| 2026-03-09 | F | 43 | - | v1 |
No output schema documented. The tool description does not state what data is returned (e.g., suggested configuration, workflow steps, execution status). Without knowing return fields, downstream tools cannot chain inputs, and the LLM cannot plan multi-step workflows. Per pattern:tool, always document output schema structure.
Descriptions of 'goal' parameter is generic ('Goal for the operation') and does not explain the expected format, length, or constraints. Descriptions of 'use_case' is vague ('Use case description for suggest_config action'). Per pattern:tool-description, describe the expected format and provide examples of what constitutes a valid goal/use_case.
Tool description is vague about WHEN to use each action and WHY. 'Suggest VirtualBox VM settings via LLM sampling' does not explain: What problem does this solve? When should the agent call this vs. another tool? What prerequisites must be met? Per pattern:tool-description, descriptions must answer WHAT, WHEN, and WHY.
No error handling guidance. The tool description does not state what to do if: the VM does not exist, the workflow fails, the LLM sampling fails, or the user provides invalid parameters. Per pattern:recovery-guide, error responses must tell the LLM what to do next (retry, ask user, call another tool).
The 'action' parameter enum (suggest_config, sandbox_workflow, workflow) makes the tool's behavior unpredictable to the LLM. LLMs struggle with tools that change behavior based on enum parameters. Per pattern:tool, each distinct behavior should be a separate tool with a clear, verb-oriented name.