bdesign_canvas_continue_from_tail

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

Annotations declare idempotentHint and destructiveHint, but the description does not disclose any side effects, whether it mutates canvas state, or how destructive behavior manifests. It only says 'create', which could imply modification but without explicit warning.

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, direct sentence that packs the entire workflow into one line without unnecessary words or repetition. It is highly concise and well-structured.

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?

With 9 parameters, 0% schema description coverage, and no output schema, the description leaves out nearly all necessary context. It does not specify required vs optional fields, the meaning of projectId/assetId/commandId, or what the tool returns aside from an implicit reference. It is far from complete for a tool of this complexity.

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?

The schema provides zero descriptions for any of the 9 parameters, and the description does not explain any parameter names or their roles. Only a conceptual 'first_frame' reference is mentioned, not mapped to actual schema fields. There is no compensation for the absence of parameter docs.

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 specific actions: extract the tail frame, place it on Canvas, create a continuation node, and call bdesign_generation_submit. It is action-oriented and distinct enough, though it does not explicitly name a sibling alternative.

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?

It provides a sequential workflow and mentions calling another tool, but does not specify when this tool should be chosen over alternatives like bdesign_canvas_apply or bdesign_asset_extract_frame. No comparison is given.

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