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

Beyond the annotations (readOnly, idempotent, openWorld), the description adds real behavioral context: default timezone handling, the 10:00 ET release convention, the caveat that the BLS page sometimes lists only one or two upcoming dates, and the cost of 1 credit. It doesn't disclose failure behavior when no date is listed, which keeps it below a 5.

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?

Content is front-loaded with the core question and answer shape, then caveats. It is slightly dense with asides (timing comparison, source limitation, credit cost), but each sentence contributes useful information rather than padding.

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?

With no output schema, the description does the work of explaining the return payload (three time zones plus reference month) and source reliability, which is what an agent needs. The only missing piece is what happens when BLS lists no future date at all.

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% and the single optional timezone parameter is already well documented with IANA examples. The description restates the London default, adding mild confirmation but no new syntax or format detail, so the schema carries the load and baseline 3 applies.

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 question naming the exact resource (next JOLTS release) and states precisely what comes back: next release date/time in three zones plus reference month. It explicitly contrasts itself with the sibling tool next_jobs_report_release by noting JOLTS is 10:00 ET rather than 08:30 ET, so an agent can discriminate without opening either schema.

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?

It gives clear context for use (scheduling/checking the next release) and an explicit when-not signal: 'Gives dates only, not the job openings figures,' which steers agents away if they want the actual data. The only gap is that it doesn't name the tool to use for the underlying figures.

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