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

No annotations are provided, so the description must disclose behavioral traits. It mentions billing (1 credit per call) but does not state that this is a read-only operation, whether pagination is involved (though the 'after' param hints at it), or any other side effects. The bare description leaves safety and behavior entirely opaque.

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?

While very short (one sentence), it conveys almost no useful information beyond identifying the endpoint group. The line 'Group: v1 Endpoint (Old Sora App)' is borderline redundant with the title. It is concise but not effective, as it omits purpose and usage details.

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 simple feed tool with only 2 optional parameters and no output schema, the description should explain what the tool returns and any operational constraints. It only mentions billing and the group, leaving the agent to guess the response structure and behavior. Given the lack of annotations and output schema, this is insufficient.

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 input schema already provides full descriptions for both parameters (after and limit) with 100% coverage. The tool description adds no additional parameter semantics. Baseline 3 is appropriate since the schema handles it.

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 states 'Images Feed' which implies retrieving a feed of images, distinguishing it from sibling feeds like videos and home/top. However, it lacks a clear verb (e.g., 'Retrieve') and provides no detail on what the resource is beyond the name. It is minimally clear but not fully descriptive.

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?

No guidance is provided on when to use this tool versus alternatives. The description does not mention any selection criteria, constraints, or comparisons to sibling tools such as get_v1_feed_videos or get_v2_feed.

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