compose_branded

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

No annotations are provided, so the description must bear the full burden of behavioral disclosure. It only states the action without detailing effects, requirements, output behavior, or side effects. It does not mention that a new file is created, whether the source is modified, or how composition-aware placement is determined.

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, front-loaded sentence with no extraneous words, making it highly concise. However, it is under-specified, trading substance for brevity, so it loses a point for not earning its place with more useful detail.

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 5 parameters, no output schema, and no annotations, the description is severely incomplete. It fails to explain composition-aware logic, parameter behaviors, or expected output, making it inadequate for an agent to invoke the tool correctly.

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's phrase 'composition-aware placement' hints at how logo_scale and logo_variant might interact, but it doesn't formally explain parameters beyond what the schema already provides, so no additional credit is warranted.

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 a specific verb 'Overlay' with the object 'logo' and qualifies with 'composition-aware placement', which distinguishes it from sibling tools. However, it doesn't elaborate on what composition-aware entails, so it's clear but not fully detailed.

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?

There is no guidance on when to use this tool versus alternatives like generate_image or style_transfer, nor any mention of prerequisites or exclusions. The description leaves the usage context entirely implicit.

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