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sandbox-manager

Inspect, upgrade, or restart the sandbox this Agent is running in. Use when the user asks about this Agent's sandbox or virtual machine status, Agent image version, or explicitly asks to upgrade or restart its current environment.

Quality

92%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

81%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is highly actionable and operationally safe: complete executable snippets, explicit validation and error-recovery checkpoints, and precise semantics for every operation and result shape. Its main weakness is repetition — the reply-immediately/verify-after-recovery rules are stated three separate times, which costs tokens without adding clarity.

Suggestions

State the "reply immediately, call no more tools, verify with get_sandbox_info after recovery" rule once (e.g., in a single shared section) and reference it from the upgrade and restart sections instead of repeating it in the quoted outputs, the per-section prose, and Safety and persistence.

Trim or shorten the full quoted result.content blocks for upgrade and restart to the operationally relevant lines, since the following prose paragraphs already paraphrase the same information.

Consolidate the overlapping bullets in "Safety and persistence" (lines about resumption, cancellation, and no-auto-retry largely restate the restart and upgrade sections) into a short checklist that only adds new information.

DimensionReasoningScore

Conciseness

The post-recovery guidance ("Reply to the user now and do not call more tools" / "use get_sandbox_info to verify") appears in the quoted tool outputs and is then restated nearly verbatim in the prose after both the upgrade and restart sections, and a third time in "Safety and persistence". Sections are otherwise code-first and efficient, but this triple repetition is a clear tightening opportunity, fitting "mostly efficient but could be tightened" better than the minor-trimming level of 4.

3 / 5

Actionability

Three complete, copy-paste-ready run_sdk_snippet blocks with imports, a consistent error pattern (raise SystemExit(1) after printing result.content), branch handling on data["operation"], and concrete result.content/result.data examples for every outcome (including the already_current case). Fully executable and covering the common cases.

5 / 5

Workflow Clarity

Despite involving destructive operations, every checkpoint is explicit: user-intent gates before upgrade/restart, saving work to .workspace before a rebuild, the immediate-reply rule, post-recovery verification via get_sandbox_info, and a no-auto-retry error loop ("Inspect the returned error, and after recovery use get_sandbox_info before deciding what to do next"). This clears the destructive-operation cap and matches the explicit-validation-with-error-recovery anchor.

5 / 5

Progressive Disclosure

No bundle files exist, and the ~175-line body is cleanly sectioned (terminology, result reading, one section per operation, safety) so navigation is easy. However, it exceeds the under-50-line simple-skill case, and the duplicated post-recovery prose and long typical-output blocks leave minor organization gaps — good structure, but not the ideally split/consolidated layout of a 5.

4 / 5

Total

17

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is exemplary: third-person, concise, and complete. It names all three concrete operations, gives an explicit "Use when..." clause with natural trigger terms and synonyms, and scopes itself unambiguously to the current Agent's own sandbox.

DimensionReasoningScore

Specificity

"Inspect, upgrade, or restart the sandbox" plus "sandbox or virtual machine status, Agent image version" lists every concrete operation the skill performs with its object, with no gaps in coverage — this is the skill's complete scope, matching the comprehensive-actions anchor rather than the minor-gaps anchor at 4.

5 / 5

Completeness

The what ("Inspect, upgrade, or restart the sandbox this Agent is running in") and an explicit when ("Use when the user asks about this Agent's sandbox or virtual machine status, Agent image version, or explicitly asks to upgrade or restart") are both stated with concrete trigger phrases, exactly matching the 5-anchor structure.

5 / 5

Trigger Term Quality

Natural user terms are covered comprehensively — "sandbox", "virtual machine", "environment", "Agent image version", "status", "upgrade or restart" — including the domain synonyms; only the trivial "VM" abbreviation is absent, which does not rise to the "a few natural terms missing" level of a 4.

5 / 5

Distinctiveness Conflict Risk

The scope is tightly pinned to "the sandbox this Agent is running in" / "this Agent's sandbox", carving a clear niche that will not fire for generic VM, host-machine, or infrastructure-management skills.

5 / 5

Total

20

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

dtyq/magic

Path

backend/super-magic/agents/skills/sandbox-manager/SKILL.md

Reviewed

Table of Contents

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