create_travel_poster

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

With no annotations, the description fully discloses synchronous behavior ('returns a hosted image URL directly, NO check_job needed'), token cost (~200-500), and that a face-only photo gets a full body drawn. It also explains rendering quality variations for curated vs. non-curated countries.

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 detailed yet relatively concise, packing significant information into a few sentences. It front-loads the core purpose and key differentiators, though some details (curated list) could be streamlined.

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 tool with 3 parameters, no output schema, and no annotations, the description covers all necessary aspects: purpose, parameters, behavioral traits, cost, limitations, and integration with a sibling tool. It leaves no major gaps.

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%, providing baseline 3. The description adds value by explaining each parameter's role: country can be any but best for curated set, aspect defaults with two options, image_url accepts external or hosted and supports face-only crops. This goes beyond the minimal schema descriptions.

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 specifies a very distinctive use case ('turn a face photo into a vintage TRAVEL POSTER') with concrete visual elements (map, landmarks, passport, stamps, compass, serif caps). It clearly distinguishes from sibling tools like generate_image or create_montage by describing a unique, branded style.

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?

Explicitly states when to use (create a travel poster) and provides a pointer to an alternative: pass the returned URL to generate_video for animation. It also notes that 24 curated countries render best but any country works, helping the agent decide. Missing a clear 'when not to use' statement.

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