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

Annotations already declare non-read-only, non-destructive, non-idempotent, closed-world, so the safety profile is covered elsewhere. The description adds only that a 'mark envelope' is returned; it does not say what side effects 'certify' has, whether it creates persistent state, or what 'profile conservation-claim' constrains.

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?

It is a single front-loaded sentence with no padding, which is good, but the brevity is achieved through undefined terms rather than precision. It reads as an internal shorthand rather than an instruction an agent can act on.

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?

An output schema exists so return values need not be spelled out, but three undocumented parameters, a nested free-form object, and an unexplained certification profile leave too much unresolved for a non-idempotent mutation.

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?

Schema description coverage is 0% across three required parameters, including a free-form nested 'inputs' object, and the description contributes nothing about module_id, subject, or what keys 'inputs' expects. This is the worst combination: full documentation burden with zero compensation.

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 names a verb ('Certify') and a result ('mark envelope'), so it is more than a restatement of the name. But 'profile conservation-claim' and 'envelope' are unexplained jargon, and with a sibling literally named viridis_certify the description never clarifies how this differs from the plain certify tool.

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?

No when-to-use or when-not-to-use guidance is given. The presence of viridis_certify in the sibling list makes the missing routing information significant — an agent cannot tell whether this supersedes, wraps, or complements it.

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