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

With no annotations provided, the description carries the full burden of behavioral disclosure, and it delivers thoroughly. It states no payment is required, the workspace is pre-funded with a fixed balance, expires exactly 24 hours after creation regardless of activity, is then permanently deleted with all contents, and rejects deposit/refund operations. This is exceptional transparency for a tool with no annotation coverage.

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?

Every sentence earns its place: opening hook, usage guidance, behavioral details, return shape, and caveats. The most important facts are front-loaded, and the alternative routing comes immediately after the purpose statement. Despite being dense, it remains readable and well organized.

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 zero-argument creation tool with no output schema and no annotations, the description is complete. It covers what the tool does, when to use it, what the return value looks like, the expiration/deletion behavior, and the money-related restrictions. Nothing an agent needs to invoke this correctly is missing.

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 has zero parameters and 100% schema description coverage, so the baseline is 4. The description reinforces this by explicitly stating there are 'no arguments,' which removes any ambiguity an agent might have about hidden or optional inputs.

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 opens with a specific verb and resource ('Create a free trial workspace') and immediately differentiates it from the sibling aanet_create_workspace by stating it is for exercising the API before committing real money. It clearly identifies this as a distinct creation operation rather than a generic or ambiguous action.

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 explicitly says to use this instead of aanet_create_workspace when the goal is to exercise the API, and provides an exclusion: if the task won't fit in 24 hours, create a real workspace instead. It also warns that aanet_deposit and aanet_request_refund reject trial workspaces, giving the agent clear routing guidance.

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