simplengat_upscale_image

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 mentions the API endpoint and pricing but does not disclose side effects (e.g., whether the original is modified or a new image is created), authentication needs, or rate limits. Significant behavioral gaps.

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-loads the action and target, then adds pricing and endpoint. Efficient with no filler, though the endpoint could be omitted as it's likely in the schema.

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?

For a simple upscale tool with 2 parameters and no output schema, it covers the core action and inputs but omits return format, whether the operation is synchronous, and how to retrieve the upscaled image. Adequate but not thorough.

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 100%, so both parameters are already documented. The description repeats 'Default 2k' but adds no new semantics beyond the schema, meeting the baseline.

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?

States a clear verb ('Upscale') and resource ('generated images') with resolution options (2K/4K). Distinguishes from generate/delete siblings by action, though it doesn't explicitly name alternatives.

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?

Provides cost conditions ('Free for 2K; 4K VIP only') and references the input from generate_image, but doesn't explicitly state when to use this tool vs. alternatives or when not to use it. Usage is implied but not explicit.

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