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

Annotations already declare readOnly, idempotent and non-destructive, so the description correctly doesn't repeat those. The genuinely useful addition is the cost fact ('does not spend credits'), which matters in a toolset where other calls presumably do cost credits. It doesn't say anything about result size or ordering.

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?

Two short clauses, front-loaded with the resource and scope, followed by the cost caveat. No filler.

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 no parameters and no output schema, the description carries the burden of hinting at the return shape, and it does so partially by naming the readiness flag. It stops short of saying what other profile fields come back or roughly how many authors, which would help an agent decide whether to page or reuse the result.

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 tool takes zero parameters, so there is nothing to document; baseline is 4. The description correctly avoids inventing filtering options.

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?

States a specific verb and resource ('List author profiles') scoped to 'this project', and adds the key payload detail that each entry carries a create_article readiness flag. This clearly separates it from create_author and add_author_sample.

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 mention of readiness for create_article implicitly tells the agent to call this before authoring, and 'does not spend credits' signals it is a cheap pre-check. It lacks an explicit 'use X instead when...' routing statement, so it stops short of top marks.

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