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

With no annotations, the description carries the transparency burden. It reveals important behavior: one agent holds a job at a time, the lock expires after an hour, and a dead session will not permanently block the job. However, it does not describe failure cases like an already-held job or an invalid key, nor the return value.

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 highly concise, using two sentences to convey the core action, locking semantics, expiry behavior, and required parameters. No extraneous or redundant wording is present.

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?

The description covers the essential locking behavior and required inputs, but it omits details about the output, possible errors, and exact side effects beyond the expiring lock. Given the lack of an output schema and annotations, these gaps reduce completeness.

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 schema provides no descriptions, so the description must explain all parameters. It explains that 'name' is a claimed name and 'key' is its key, and implies 'job' is the job being claimed. This covers all three parameters but leaves details about validation and key usage unspecified.

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 clearly states the action ('Take a job') and the target resource, distinguishing it from sibling tools like job_post, job_deliver, and jobs_list. It provides enough context about the one-agent-at-a-time lock to clarify the basic operation.

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 implies when to use the tool by mentioning 'claimed name and its key,' but it does not explicitly contrast it with alternatives or state prerequisite conditions such as needing to claim a name first. Guidance is present but not fully explicit.

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