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

With no annotations, the description carries the full burden. It discloses that no input and no account are required, which is useful for an authentication-sensitive domain. However, it does not describe whether the operation is read-only, what its output contains (despite an output schema), or any other behavioral traits like rate limits or side effects.

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 three short sentences with no wasted words. The first sentence is slightly awkwardly phrased as a title-like clause followed by a list, but the key constraint 'No input, no account needed' is front-loaded after the content summary.

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?

Given the simplicity (zero params, output schema exists), the description is nearly complete: it explains the purpose, the covered topics, and the lack of prerequisites. It could be stronger by stating when this tool should be invoked relative to siblings, but the essential information for an agent to call it is present.

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 the baseline is 4. The description adds the explicit confirmation 'No input, no account needed,' which aligns with the schema and reassures the agent about the call requirements.

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 the tool's purpose as onboarding for MolTrust Ads and lists the concrete content covered: verdicts, plans, key sign-up, SDK, and endpoints. It does not explicitly differentiate itself from siblings like ads_check or moltguard_credential_issue, but the onboarding focus is clear enough for an agent to understand its role.

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 only usage hint is 'No input, no account needed,' which tells the agent it can call it without prerequisites. There is no guidance on when to use this tool versus alternatives such as ads_check or the moltguard tools, nor any indication that it should be called first in a workflow.

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