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Create Volume

volume_create

Create a named persistent volume that survives sandbox restarts and can be shared across sandboxes.

Instructions

Create a named persistent volume. Volumes survive sandbox restarts and can be shared across sandboxes.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesVolume name
sizeMibNoQuota in MiB
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations indicate mutation (readOnlyHint=false), and the description adds that volumes are persistent and shareable. However, it fails to disclose any side effects, required permissions, or whether the operation is reversible.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences long, front-loaded with the primary action, and contains no extraneous information. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description misses information about the return value (e.g., volume ID or status). It adequately covers the tool's core purpose but lacks complete behavioral context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 100% schema coverage, the schema already documents both parameters. The description adds no extra semantic context beyond the schema, such as naming conventions or size unit implications.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool creates a named persistent volume, and highlights key features (survives restarts, shareable) that distinguish it from sibling tools like volume_list or volume_remove.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage (when you need a persistent volume) but does not explicitly state when to avoid or mention alternatives. No 'when not' guidance is provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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