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

With zero annotations, the description carries the full disclosure burden and mostly fails it: it does not say whether the call is read-only, whether it mutates trial state, whether it can fail when the stopping rule has not yet been met, or what the verdict contains. The one useful signal is that the verdict is rule-determined rather than an arbitrary input.

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 single fragment is front-loaded and wastes no words, but its brevity comes from under-specification rather than efficiency. Nothing is padded, yet nothing is earned back either.

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 tool sitting in a multi-step trial workflow (fork, register protocol, run, score, unblind), the definition gives the agent no idea where this call fits, what it returns, or what happens on premature invocation. No output schema exists to offload return-value semantics, so the gap is real.

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 single parameter trial_id has 0% schema description coverage and the description says nothing about it — no format, no source (where the agent obtains a trial_id), no behavior on unknown IDs. With a parameter present, the description needs to compensate and 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 is a noun phrase with no verb, so it never says what the tool actually does — compute, retrieve, or finalize a verdict. The only added information over the name is the domain hint "under the enforced stopping rule," which does not distinguish it from siblings such as trial_score or trial_unblind.

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?

There is no statement of when to call this versus trial_score, trial_run_pair, or trial_unblind, and no ordering or precondition guidance. The stopping-rule phrase faintly implies it applies after a trial concludes, but no alternative is named and no exclusion is stated.

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