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

Annotations already indicate this is idempotent and not destructive or read-only, so the description doesn't need to restate those. The description adds context about 'public award activity' and 'one exact vendor UEI', but it doesn't explain what happens if the vendor is already watched, whether an immediate alert triggers on creation, or any side effects beyond creating a watch. Since idempotentHint true and destructiveHint false are given, the additional context is minimal, and the score reflects the limited extra value.

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 one short sentence, efficient and front-loaded with the core action and object. However, given the complexity (5 params, 0% coverage), the brevity may be too sparse, but it doesn't have waste. It earns a 4 because it's appropriately concise for its limited content.

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?

The tool has 5 parameters, no output schema, and minimal annotations description coverage. The description only addresses the core purpose and requirement for an exact UEI but lacks essential details such as how to configure alert cadence and delivery channels, prerequisites like whether the vendor must exist, or behavior regarding duplicates. This is incomplete for an agent to use it correctly without additional inference.

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 schema has 5 parameters and the description provides no details about them, with schema description coverage at 0%. The description mentions 'UEI' as the identifier and implies the vendor name, but it does not explain the meaning or purpose of 'enabled', 'alert_cadence', or 'delivery_channels'. Since the schema itself provides little semantic context (just types and defaults), the description fails to compensate, leaving the agent without guidance on how to set these parameters appropriately.

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 clearly states the action (watch) and the resource (public award activity) for a specific vendor UEI. It distinguishes from the sibling 'watch_award' by specifying 'vendor' and 'public award activity', though it could be more explicit about 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?

The description implies when to use it (when you want to watch a vendor's award activity) and the exact UEI requirement, but it does not provide explicit guidance on when not to use it or mention alternatives like 'update_award_watch' for existing watches. The sibling list includes 'update_award_watch' and 'get_watch_status', which could be relevant but aren't referenced.

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