get_messages

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

With no annotations, the description carries the behavioral burden. It does disclose useful behavior: the result covers all messages and is ordered oldest first. However, it omits pagination/limits, error behavior, permissions, and any explanation of what 'YELLOW.' means, so the behavioral profile is incomplete.

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 core sentence is short and front-loaded, and the Args section is appropriately compact for one parameter. The dangling 'YELLOW.' does not earn its place and creates ambiguity, which prevents a higher score.

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 one-parameter getter without an output schema, the definition conveys the basic return subject and ordering. It lacks detail on the message shape, failure modes, and the meaning of 'YELLOW,' leaving some uncertainty for an agent that needs to consume the response or handle errors.

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 only parameter is described as 'numeric request id,' which essentially restates the schema's integer type and 'Request Id' title. Since schema description coverage is 0%, the description needed to add operational meaning such as where to obtain the id, constraints, or an example, and 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 identifies a concrete operation and resource: it returns all messages for a request, oldest first. This is specific enough to separate it from sibling tools like get_request or list_attachments, though it does not name alternatives and the stray 'YELLOW.' marker is unexplained.

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 phrase 'of a request' implies the intended context: use this when you need the message thread for a specific request_id. It gives no explicit when-not-to-use guidance and does not point to alternatives such as get_request for request metadata or list_attachments for files.

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