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buildx_inspect

Read-only

Inspect a Docker builder instance to view its status and configuration. Optionally bootstrap the builder if it is not running.

Instructions

Inspect a builder instance.

args: name - Builder name (defaults to the active builder) bootstrap - Boot the builder if it isn't already running returns: dict - {"returncode": int, "stdout": str, "stderr": str, "truncated": bool}. stdout is human-readable; parse with the agent or call buildx_list for JSON.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo
bootstrapNo
Behavior4/5

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

Beyond the readOnlyHint and destructiveHint annotations, the description reveals that the tool can bootstrap the builder if not running, and explains the return format (human-readable stdout). This adds behavioral context.

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 very concise: one-line intro, then a list of args and returns. Every sentence adds value; no redundancy. Front-loaded with the main purpose.

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

Completeness4/5

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

Given two parameters, no output schema, and 0% schema coverage, the description covers usage adequately, including return format and an alternative for structured output. It is complete for an inspection tool.

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

Parameters4/5

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

With 0% schema description coverage, the description adds meaning: 'name' defaults to active builder, 'bootstrap' boots if not running. This compensates for the schema's lack of descriptions.

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 'Inspect a builder instance,' specifying the verb 'inspect' and resource 'builder instance.' It also mentions defaulting to the active builder, distinguishing it from siblings like buildx_list.

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

Usage Guidelines4/5

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

The description provides context for when to use the tool (to inspect a builder) and hints at alternatives by suggesting buildx_list for JSON output. It doesn't explicitly list exclusions but is adequate.

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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