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

The description discloses key behavioral aspects: it POSTs events to a webhook, charges $0.01/day prepaid from API credit, and has a 90-day maximum. It does not mention failure modes or error handling, but the core side effects are clearly stated, which is good given the absence of annotations.

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 compact and well-structured, condensing the core function, event mechanism, pricing, and duration into a few clear sentences with no redundant information.

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 schema constraints (e.g., days between 1 and 90, threshold between 0.5 and 1) and the description covering the main operational details, the tool is adequately described for an agent to use it correctly. Some aspects like error handling are omitted, but they are not critical for basic invocation.

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 covers 5 parameters but only provides a description for api_key. The tool description adds meaning for name (the monitored entity), webhook_url (receives events), days (duration capped at 90), and api_key (payment method), but threshold is not explained. This partial coverage earns a mid-range score.

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 tool's primary function: 'Monitor a name against all sanctions + US export-control lists.' It distinguishes this from one-time screening tools by emphasizing ongoing monitoring with daily refreshes, making it evident this is for long-term watch activities.

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 this tool (for ongoing monitoring rather than immediate screening) through phrases like 'daily list refresh' and 'watch_changed' events. It also mentions cost and duration limits, but does not explicitly name alternative tools or contrast with one-time screening services, so it falls slightly short of the highest standard.

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