Image & Chart Prompt Assistant

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

No annotations are provided, so the description carries the full burden. It describes the types of assistance offered but does not disclose limitations, side effects, or input validation behavior. The description adds some context but lacks depth on operational details.

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 only two sentences plus a chart-specific hint. Every sentence adds unique value, and the structure is front-loaded with the core purpose, followed by scope and a specific usage tip.

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 complexity of 7 parameters and no output schema, the description covers major use cases and provides a specific hint for chart design. It lacks detail on some request types like optimize_prompt or troubleshoot, but the schema fills those gaps. Overall, it is sufficiently complete for guiding an AI agent.

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 coverage is 100%, so the baseline is 3. The description adds extra semantics by explicitly linking chart_design request type with color_scheme and listing use cases that match the enum, providing guidance beyond the schema.

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 tool's purpose: providing expert prompt templates and guidance for Gemini image generation, covering photography and chart design. It distinguishes itself from siblings like generate_image by focusing on prompting assistance rather than direct image generation.

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 includes explicit guidance for using chart_design with a color_scheme for professional design system prompts, which helps in choosing the right request type. However, it does not provide when-not-to-use scenarios or compare with alternative tools.

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