create_area_chart

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

With no annotations present, the description carries the disclosure burden. It does reveal that the tool returns a base64 image or a file path and supports stacking, which is useful. However, it omits behavioral details like saving to disk, output format resolution, and other side effects controlled by parameters.

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 sentence with no filler and is front-loaded with the core purpose. Every phrase earns its place, making it highly concise for a tool description.

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 14 parameters, nested data objects, no output schema, and no annotations, a one-sentence description is not enough for an agent to use the tool correctly. Important context about parameter behavior, output mode choices, theme presets, and file-saving behavior is missing.

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?

Schema description coverage is only 36%, so the description needs to compensate, but it barely does. It only hints at stacking and at output via base64 or file path, leaving most of the 14 parameters—data structure, themes, labels, dimensions, normalization, opacity—without meaningful explanation.

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 identifies the tool as creating an area chart and adds the distinguishing feature of stacking support. It names the specific chart type, which helps separate it from line, bar, pie, and scatter chart siblings, though it does not explicitly state why this chart type is chosen over others.

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?

No guidance is given on when to use this tool versus the sibling chart-creation tools. The mention of stacking implies a possible use case, but there are no explicit conditions, exclusions, or comparisons to alternatives.

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