create_price_watch

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

With no annotations, the description carries the full burden. It discloses key behaviors: costs 1 credit, watch lives 90 days, and each fire results in an HMAC-signed POST to the callback URL. This provides valuable context beyond the schema.

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 three sentences, concise and front-loaded with the core purpose. Every sentence adds value: purpose, cost/duration, and delivery details. 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?

The description covers cost, expiration, and delivery mechanism, but it does not explain the return value format, error handling, or what happens on successful creation. For a tool with 6 parameters and no output schema, more context on outcomes would be beneficial.

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 input schema has 100% description coverage and includes enums for two parameters. The description does not add additional semantic meaning to the parameters beyond what the schema already provides, so baseline 3 is appropriate.

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: 'Register a webhook watch on a model price change.' It uses a specific verb and resource, and the name 'create_price_watch' combined with the description distinguishes it from sibling tools like 'create_digest_watch' and 'create_status_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?

The description does not explicitly state when to use this tool versus alternatives. While the name and resource type imply it is for price watches, there is no guidance on when not to use it or which sibling to choose for other scenarios.

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