hyperframes_still

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 only states the basic operation (rendering a frame) but does not disclose whether the operation is read-only, destructive, or any side effects. For a tool that likely does not modify the project, this information would be helpful but is missing.

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 concise: a single-sentence summary followed by a clear bullet list of parameters. No redundant or extraneous information. The structure is front-loaded with the key action.

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?

The description covers the tool's core purpose and parameters. Given the presence of an output schema, it need not detail return values. However, it could briefly mention that the output is an image file, which is already implied by 'as image'. It is otherwise sufficiently complete for a single-frame rendering tool.

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?

With 0% schema description coverage, the description compensates by explaining each parameter's purpose and expected values (e.g., 'Absolute path to the Hyperframes project directory'). This adds significant meaning beyond the schema's bare type definitions.

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 'Render a single frame as image from a Hyperframes composition', specifying the action (render), resource (Hyperframes composition), and output (single frame image). This distinguishes it from sibling tools like hyperframes_render or hyperframes_snapshot, which have different scopes.

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?

The description does not provide explicit guidance on when to use this tool versus alternatives (e.g., hyperframes_render for full video rendering). It lacks 'when-not' or alternative tool suggestions, leaving the agent to infer based solely on the tool's name and purpose.

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