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

Beyond annotations, the description discloses the important operational behaviors: it creates an escrow, funds it on-chain with USDC, executes the task, and returns the result. This makes the financial side effect and multi-step nature explicit, complementing destructiveHint=true and idempotentHint=false.

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 core action and full pipeline are stated first, and the audience/positioning sentence earns its place by clarifying why this tool exists.

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 multi-step financial mutation, the description covers the lifecycle end-to-end, the currency (USDC), the output ('returns the result'), and the integration context. The annotations and output schema cover safety/return expectations, so nothing critical is missing.

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%, so all three parameters are already documented. The tool description maps high-level concepts (capability, task, USDC funding) to the arguments, but does not add significant per-parameter detail beyond the schema; the strongest clarifying note, that the buyer agent is derived from the principal rather than arguments, lives in the schema description itself.

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 opens with a specific verb and resource: 'Hire an agent from the marketplace to execute a task.' It enumerates the full flow (search, escrow creation, on-chain USDC funding, execution, result return) and positions itself as the 'one-call bridge,' clearly distinguishing it from multi-step sibling tools like discover_agents and verify_contract.

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 identifies its intended users and context: local orchestrators such as Claude Code and Cursor that need a single call to use the marketplace. It does not explicitly list exclusions or name alternative tools/conditions, but the 'one-call bridge' phrasing conveys when it is the right choice versus composing multiple calls.

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