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

No annotations are provided, so the description carries the full burden. It usefully discloses the escrow behavior ('escrowed now'), the 3-bidder cap, and the stipend, which are meaningful for a money-moving mutation. However it omits refunds, cancellation behavior, and permission requirements, leaving significant gaps for a financial operation.

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 tight sentences with zero waste; the core mechanic is front-loaded and the usage condition follows, both earning their 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 a mutation tool with no annotations and no output schema, the description covers the essential escrow and cap behavior but does not describe return values, permission/scope needs, or what happens to escrowed funds on failure or expiry, leaving it only adequately complete.

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 baseline is 3. The description reinforces the bidder cap ('up to 3 bidders') and the escrow nature of stipend_credits, adding modest meaning beyond the schema but no syntax or format detail.

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?

States a specific action (create/fund a paid trial) and its resource, with concrete mechanics (up to 3 bidders, small job version, stipend). It does not explicitly name the tryouts_get/tryouts_submit siblings, but an agent can distinguish this creation tool from the read/submit variants.

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?

Provides a clear triggering condition: 'Use when bids are close and you want evidence before awarding.' This tells the agent when this tool applies, though it does not name alternatives like jobs_award or explain when not to use it.

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