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

With no annotations provided, the description carries the burden of disclosing behavior. It clearly discloses the paid requirement, exact cost ($0.002 USDC), and payment destination address on Base L2. It also explains what the returned data contains and provides context about the source of the voices. It does not mention potential prerequisites like payment readiness or auth, but the fee and destination are well covered.

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 front-loads the most important signal ('PAID — $0.002 USDC'). Each sentence adds useful information, though the cost is mentioned twice (in the bracket and again in the payment sentence), creating minor redundancy. Overall it is efficient and well structured.

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 tool with one optional parameter and an output schema, the description provides the essential context: cost, payment address, return fields, and the free alternative. It does not describe pagination or response count behavior related to 'limit', but the presence of an output schema and simple parameter set keeps this from being a major gap.

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 one optional 'limit' parameter with no description and 0% schema description coverage. The tool description does not explain the meaning or effect of 'limit' — it is only implicitly inferable from its name and default value of 15. The description should have compensated for the missing schema coverage but does not.

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 states a specific action ('Get the full live agent voice broadcast feed') and a specific resource ('AgentWorld's Soul Engine'), and explicitly differentiates itself from the sibling get_agent_voices_preview by positioning this as the paid full version. An agent can clearly understand what this tool does and how it differs from the preview tool.

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 explicitly names the alternative tool, get_agent_voices_preview(), and gives the condition for choosing it instead: if a free 3-line preview is sufficient. It also clearly signals the paid nature of this tool, so an agent knows to select it only when the full feed is needed.

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