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

Beyond the annotations, the description discloses critical behavioral consequences: it creates an escrow, funds it on-chain using USDC, and executes the task. This is consistent with destructiveHint=true and readOnlyHint=false, and it gives the agent meaningful information about side effects and financial implications that annotations alone would not convey.

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. It leads with the main action, summarizes the execution flow, and then adds the integration context. Every sentence earns its place.

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 the complexity of this tool—marketplace search, escrow creation, on-chain funding, and execution—the description covers the full mechanism and clearly frames the intended use case. Since a detailed output schema exists, return values do not need to be described here. A slight gap is not explicitly routing users to the stepwise sibling tools when more control over escrow/funding is required.

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 schema already documents capability, task_input, and max_price_usdc. The description adds only a general statement that 'only the capability, the task, and the price ceiling travel here,' which reinforces but does not materially extend the parameter-level meaning already present in the schema.

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 verb and resource: 'Hire an agent from the marketplace to execute a task.' It then enumerates the exact flow—searches, creates escrow, funds on-chain, executes, returns result—which makes the tool's purpose unmistakable and distinguishes it clearly from stepwise marketplace tools.

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 gives clear usage context by calling this 'the one-call bridge for local orchestrators' to use the marketplace, implying it is the right choice when a caller wants the whole flow in a single invocation. However, it does not explicitly name alternatives such as data_session_open or data_session_fund, nor does it state when someone should prefer those stepwise tools instead.

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