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

With no annotations, the description must carry the behavioral burden, and it does disclose the key mutation side effect: it increments the supplier's confirmation count for the brand. It omits whether the supplier must already exist, permission requirements, and idempotency/repeat-call behavior, which matter for a write tool with zero 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?

Two compact sentences with the action front-loaded and the side effect second; no filler or repetition. Slightly more could be said, but nothing here is wasted.

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 2-required-param mutation with no annotations and no output schema, the description covers what happens and the side effect but leaves prerequisite state, auth, and failure modes unaddressed. Adequate as a minimum-viable definition, not complete.

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 2 required params, so the description must compensate. It clarifies that brand is the scoping entity and supplier_id identifies the supplier whose invoice was ungated, which adds some meaning, but neither parameter's accepted format or constraints are elaborated.

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 a specific verb+resource ('Record that a supplier's invoice got the user approved (ungated) for a brand') and is distinguishable from the read-side siblings get_ungate_status/get_ungate_suppliers and from request_ungate_check. However, it doesn't explicitly contrast itself with those siblings, so an agent must infer the difference.

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 explicit when-to-use or when-not-to-use guidance, and no alternative tool is named. The clause 'so other users see which suppliers actually work' hints at the motivation but does not tell the agent when this call is appropriate versus request_ungate_check or get_ungate_status.

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