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

Annotations already flag the tool as destructive and not idempotent; the description adds meaningful behavioral detail by stating it creates escrow, funds it on-chain with USDC, and executes the task. This gives the agent a clear picture that real financial settlement occurs, which goes beyond the annotation flags.

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 with no filler: the first states the operational pipeline and the second states the intended integration context. Every clause earns its place and the most important action is front-loaded.

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 high-complexity tool involving escrow and on-chain payment, the description covers the full operation sequence and the intended caller, while the rich schema covers parameter semantics and an output schema is present for return details. It could be slightly stronger by explicitly warning about irreversible payment, but the destructive annotation covers that.

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 property descriptions already document capability, task_input, and max_price_usdc adequately. The tool description itself does not add param-level meaning, but the baseline of 3 applies because the schema carries the semantic load.

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 uses a specific verb ('hire') and resource ('agent from the marketplace'), then clearly enumerates the end-to-end pipeline: search, escrow creation, on-chain funding in USDC, task execution, and result return. It also differentiates from the lower-level sibling tools by branding this as the 'one-call bridge' for local orchestrators.

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 clearly scopes usage to local orchestrators wanting a single-call marketplace integration, implying it is the high-level alternative to composing multiple data_session_* calls. It does not explicitly name when not to use it or list alternative tools, so it falls just short of a 5.

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