Create a cron job

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

With no annotations provided, the description carries the full burden, and it does disclose a meaningful behavioral detail: omitted schedule fields default to [-1], causing an empty schedule to run every minute. However, it omits other important behavioral aspects such as authentication requirements, duplicate behavior, side effects, or what the response contains.

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 tight sentences that lead with the core purpose and then provide the most critical caveat. It does not repeat schema property descriptions or add fluff.

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?

Given the tool has 13 parameters, nested objects, no annotations, and no output schema, this short description is not complete enough. It covers URL and schedule defaults but says nothing about authentication, what a successful response looks like, or how this creation operation affects the account.

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 already documents most parameters at 77% coverage, so the baseline is 3. The description adds real value beyond the schema by stating that only url is mandatory and by explaining what happens when schedule fields are omitted, a nuance the schema alone does not fully convey.

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: 'Create a new cron job on cron-job.org.' This clearly distinguishes it from sibling tools like list_jobs, update_job, and delete_job by identifying it as the creation action.

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 tool's purpose implies it should be used for creating new cron jobs, and the description adds useful call-construction guidance about the mandatory url field and default schedule behavior. However, it never explicitly contrasts it with update_job or states when not to use this tool, leaving the differentiation to inference.

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