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docker_logs

Tail a container's bounded stdout and stderr logs from an instance. Outputs JSON with container and log lines.

Instructions

Tail one container's logs (stdout+stderr, bounded). Read-only. Returns JSON: {container, lines: [string]}.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
linesNoTail length (1-1000, default 200).
containerYesContainer name or ID.
instance_idYesInstance ID or name.
Behavior4/5

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

No annotations provided, so description carries full burden. It discloses read-only, bounded, stdout+stderr, and return format. Could mention error behavior but adequate for a simple log tool.

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?

Two sentences, front-loaded with purpose, then behavior and output. No wasted words. Every sentence adds value.

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?

Description is complete for a simple log tail tool: purpose, behavior, output format. But lacks notes on edge cases like container not found or stopped containers. Adequate given low complexity.

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?

Schema description coverage is 100%, so description adds little beyond schema. The description does not elaborate on parameter semantics beyond what schema already provides. Baseline 3 applies.

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 tails one container's logs (stdout+stderr, bounded) and is read-only. It distinguishes from sibling tools like docker_log_summary and docker_events_summary by specifying 'one container's logs' and output format.

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 for viewing container logs but does not explicitly state when to use this tool versus alternatives like docker_log_summary or docker_events_summary. No when-not-to-use guidance 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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