get_v2_user_stories_by_username

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 adds a billing warning (3 requests per call), which is a useful behavioral trait. However, it lacks other important information such as authentication requirements, side effects, or return value characteristics.

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 very short (two sentences plus a warning), which is concise, but it is not well-structured. The purpose is not front-loaded, and the billing warning is placed at the end. It is adequate but missing key information.

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 tool has three parameters, no output schema, and no annotations. The description does not state what information is returned, how to interpret results, or any prerequisites. It only provides a billing note and a comparison to another endpoint, leaving significant gaps for the agent.

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 67% (two of three parameters have descriptions in schema, but 'username' has only a title). The description itself does not mention any parameters or add meaning beyond the schema. Since coverage is below 80%, the description should compensate, but it does not.

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 does not explicitly state what the tool does. It mentions the endpoint URL and gives a speed comparison, but it fails to clearly specify that this tool retrieves user stories by username. The purpose is implied rather than stated, making it vague.

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 advises using the 'by/id' endpoint for better speed when efficiency is critical, providing some guidance on when not to use this tool. However, it does not elaborate on when to use this tool or provide any other usage context.

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