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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered structurally. The description adds the widget-UI audience constraint but says nothing about partial-vs-full update semantics (what happens to fields not passed) or whether the project must already be prepared, which matters for a mutation tool.

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?

Front-loaded with the action and the affected fields, followed by scope and exclusions; no filler sentences. The exclusion list is long and runs as a comma chain, but each item carries routing value.

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?

An output schema exists, so return values need no explanation, and annotations cover safety. Still, with 9 parameters at 0% schema coverage and a nested advanced_params object, the description leaves several parameters opaque, which is a real gap for an agent invoking it.

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 0%, so the description carries the burden, and it does name several editable fields (prompt, model, ratio, resolution, count, advanced params). However it gives no value semantics for ratio, resolution, duration, or the nested advanced_params object, and leaves model_id/model_name and the required project_id unaddressed.

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 specific verb and resource ('Update the prepared logo project') and enumerates the editable fields (prompt, model, ratio, resolution, number of concepts, advanced params). It positions itself in the workflow ('before opening ManyMotions or generating') but never names the sibling tools, so differentiation from prepare_logo_project/generate_logo is inferred rather than explicit.

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?

Explicit when-to-use ('only for new text-to-image logo designs from a brief') plus an unusually thorough when-not list covering uploaded/reference images, editing an existing logo, SVG/vector export, background removal, video, and trademark checks. It also scopes the audience ('Intended for the widget UI'), leaving little to inference.

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