cron

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 does disclose that responses include code snippets and that there is a 'PRO - 3 free trials' monetization/limit aspect, which is useful. However, it does not describe output format, error behavior, authentication needs, or what happens after trial limits are reached.

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 a single, reasonably compact sentence that front-loads the three action types and appends the pricing note. It earns its place, though the phrase 'with code snippets' is slightly ambiguous as to which action it modifies.

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 tool has three modes with different expected outputs, and there is no output schema. The description names the outputs (plain English, cron, next run times) but does not clarify output structure, error cases, or the practical implications of the 'PRO - 3 free trials' notice, so an agent has only partial guidance.

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 input schema already documents each parameter, including action options and example expressions. The description adds context about the overall purpose but no significant parameter-level meaning beyond what the schema provides.

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 enumerates three specific, distinct operations: explain, generate, and next_runs. It names the resource (cron expressions) with specific verbs, making it easy to distinguish from unrelated sibling utilities.

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 listing its three modes, but it does not explicitly state when to prefer this over alternatives or provide exclusions. The action enum and parameter descriptions carry most of the routing responsibility.

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