pull_image

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

With no annotations provided, the description carries the full burden of behavioral disclosure but adds minimal context. It states the action ('pull') which implies a network operation and potential mutation (adding an image to local storage), but doesn't describe traits like authentication needs, rate limits, error handling, or what happens on success (e.g., image becomes available for containers). This leaves significant gaps for a tool that likely involves external resources.

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

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

The description is extremely concise with a single sentence that directly states the tool's action. It's front-loaded with the core purpose and contains no unnecessary words or redundant information, making it efficient and easy to parse.

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

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

Given the tool's complexity (network operation, potential mutation), lack of annotations, no output schema, and minimal schema coverage, the description is incomplete. It doesn't cover behavioral aspects, parameter details, or expected outcomes, leaving the agent with insufficient information to use the tool effectively beyond a basic understanding of its purpose.

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

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

The input schema has 1 parameter with 0% description coverage, so the description must compensate but adds no parameter information. It doesn't explain what 'name' represents (e.g., image name with optional tag, registry URL), its format, or examples. This fails to address the schema's lack of documentation, leaving the parameter meaning unclear.

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

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

The description clearly states the verb ('pull') and resource ('a Docker image'), making the purpose immediately understandable. It distinguishes from siblings like 'list_images' or 'restart_container' by specifying a different action on the same resource type. However, it doesn't specify the source (e.g., Docker registry) or scope, keeping it from being fully specific.

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

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

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., Docker daemon running), when not to use it (e.g., if image already exists locally), or how it relates to siblings like 'list_images' for checking availability. Usage is implied from the action but not explicitly stated.

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