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

With no annotations, the description discloses important behavior: it creates a configuration watch, returns the created watch, is PAID, and sends emails on blanking, cut-off, slippage, and reliability drops. It still omits auth/permission requirements, duplicate-watch behavior, and cancellation or rate-limit details.

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 short, front-loaded with the core action and alert conditions, and avoids restating the parameter schema. Each sentence adds useful information about behavior, return, or pricing.

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 seven-parameter configuration tool with no annotations and no output schema, it explains what is created, why it emails, and that it is paid. It lacks some operational details such as required email setup or watch management, but the core context is 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 100%, so the schema already documents all seven parameters. The description maps alert types to the blank/cutoff/slip booleans but does not add format, constraints, or defaults beyond what the schema provides, so baseline 3 applies.

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?

Uses a specific verb ('Watch') and resource ('lane') and explains the alert outcomes: blanked sailing, cut-off closing, sailing slip, and reliability drops. It is clearly a watch-creation tool, distinct from sibling read/query tools like get_schedules, but it does not explicitly name an alternative.

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 use case is implied: create a watch to receive email alerts on lane schedule events. However, it gives no explicit when-to-use versus alternatives such as get_schedules or find_best_sailings, no when-not conditions, and no prerequisites like email setup.

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