analyze_chart_image

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

No annotations, and description does not state that the operation is read-only, nor any side effects or limitations beyond noting approximate values; the burden is on the description and it falls short.

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?

Single sentence, front-loaded with the action, no filler words.

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?

Despite a 5-parameter tool with no output schema or annotations, the description is just one vague sentence; it fails to explain the role of the task parameter, the two image input modes, or the relationship to sibling tools.

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 covers file_id, mime_type, and image_base64 with descriptions, but the task and chart_hint parameters are undocumented; description adds no parameter semantics beyond what schema already provides.

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 the specific verb 'analyze' with the resource 'chart image' and enumerates concrete outputs (labels, trends, approximate values, limitations), making it clearly distinct from generic image analysis or text extraction siblings.

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 on when to choose this tool over siblings like analyze_image or extract_text_from_image; missing when-to-use or alternatives.

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