release_printer_lease

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

Annotations already declare readOnlyHint=false, destructiveHint=false, so the agent knows this is a non-destructive mutation. The description adds genuinely useful context about the coordination consequence (the next person waits out your timeout), which annotations never convey. However, it says nothing about what happens if the caller holds no lease, or what a second call does — relevant given 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 short sentences, the action first and the rationale second, with no filler. The em-dash clause about the timeout makes the motivation concrete instead of abstract.

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 zero-parameter tool with an output schema, the description covers what is needed to call it correctly and why. The only material omission is failure behavior (no lease held, or repeated call), which is a modest gap given the non-idempotent annotation.

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 tool takes zero parameters, so there is nothing for the description to disambiguate; baseline is 4. The schema is an empty object and the description correctly makes no attempt to describe inputs.

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?

"Give the printer back" states a concrete action on a concrete resource, and the name plus the closing clause about the lease make it unambiguous that this terminates a held lease rather than acquiring or renewing one. It falls short of a 5 only because it never names the adjacent lease tools (break_printer_lease, renew_printer_lease) to sharpen the distinction.

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?

"When you are finished" gives a clear trigger condition, and "do this rather than letting the lease expire" supplies the preferred alternative to inaction. It does not address the harder case — when to use break_printer_lease instead — but the positive guidance is concrete and actionable.

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