docker_pull

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

With no annotations, the description carries full responsibility for disclosing behavioral traits. It only states the action without mentioning side effects like downloading layers, consuming disk space, requiring network access, or the confirm parameter's role in prompting. This lack of detail could lead to unexpected resource usage or failures.

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 a single, concise sentence with no filler. It is front-loaded and easily parseable. However, it might be slightly over-minimal given the existence of a confirmation parameter, but it remains appropriately sized for a simple pull operation.

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?

The tool is straightforward with only two parameters and an output schema, so the description need not explain return values. However, it omits context about when confirmation is required, how pulling interacts with the local image store, and potential side effects like disk usage. This is adequate for a simple tool but misses nuances that could affect an agent's decision.

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 schema covers both parameters (image and confirm) with descriptions, so the baseline is 3. The description itself adds no additional parameter meaning beyond what is already in the schema, and the confirm parameter is not explained in the tool description. Since schema coverage is 100%, this is acceptable but not enhanced.

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 uses a specific verb ('Pull') and a resource ('Docker image from a registry'), clearly distinguishing it from sibling tools like docker_run (which starts containers), docker_build (builds images locally), and docker_list_images (lists local images). The action is unambiguous and well-scoped.

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 over alternatives or any exclusions. It does not mention that pulling is the prerequisite for running images, nor does it contrast with docker_build or docker_run. This leaves the agent without context for selection decisions.

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