List a service for sale

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

Annotations already indicate it is not read-only, not destructive, and open-world. The description adds value by disclosing that Obol auto-issues a verifiable credential and returns the marketplace URL, clarifying side effects beyond what annotations provide.

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 two sentences with no wasted words. The purpose is front-loaded, and key details (API key, credential issuance, URL return) are provided efficiently.

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 tool has 8 parameters (3 required) and an output schema, the description covers the main purpose and side effects adequately. It could add more guidance on parameter usage, but the schema provides some descriptions.

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 63%, and the description adds no additional meaning to any parameter. It does not compensate for the missing schema descriptions, so the score is at the baseline of 3.

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 lists/publishes a new service on the Obol marketplace for discovery and payment, distinguishing it from sibling tools like find_service (search) and pay_and_call (consume). The verb 'list' and resource 'service' are specific.

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 mentions the prerequisite of the OBOL_API_KEY environment variable, providing clear context for when to use this tool. It does not explicitly exclude cases where alternatives are better, but the sibling tool names imply when to use each.

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