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

Annotations already mark it read-only, idempotent, non-destructive, and closed-world. Description adds meaningful context that it does not settle the x402 payment and does not itself create the watch, though auth requirements and validation failure behavior remain unstated.

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 sentences, front-loaded with the core action and result, followed by the key non-effect caveat. No wasted words.

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 rich schema and annotations, description covers the main behavioral boundaries and states the return artifact despite no output schema. It could say more about validation failure or error shape, but is largely complete for a preparation tool.

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 coverage is 100% and all five parameters have detailed descriptions, so the schema carries parameter semantics. The description adds no parameter-specific syntax or meaning beyond schema.

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?

Specifies verb+resource: validate an expected future Algorand USDC payment and return the exact HTTP/x402 request to create a durable watch. It clarifies it does not settle payment or create the watch, but does not distinguish from siblings such as prepare_recovery or get_watch.

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?

Implies use when preparing a watch request for a future payment and explicitly states it does not settle or create the watch. However, it does not name alternatives or specify when to choose prepare_recovery or get_watch over this tool.

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