tool_datetime_convert

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

With no annotations provided, the description carries the full burden of disclosing behavior. It states the core conversion capability but does not disclose important behaviors such as how Unix timestamps are detected or converted, what happens when from_format or to_format is null, whether invalid datetimes cause errors, or how the defaults of UTC are applied. This is a meaningful gap for a conversion utility with non-obvious edge cases.

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 concise sentence with no filler or redundancy. It is appropriately front-loaded with the primary action and resource. It loses a point because it is so brief that it omits useful context, but as a concise summary it is effective.

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?

Although an output schema exists, the description is too sparse for a 5-parameter conversion tool. It does not explain timezone input formats, datetime format syntax, the role of from_format and to_format, the direction of Unix timestamp conversion, or default behavior. An agent would need external knowledge about common timezone/format handling to confidently use this tool correctly.

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 0% and the description adds no parameter-specific meaning. The phrase 'timezones/formats' weakly maps to from_tz/to_tz/from_format/to_format, and 'including Unix timestamps' hints that dt_string may accept a Unix timestamp, but it does not explain how the parameters interact or which formats are accepted. The description does not compensate for the complete lack of schema descriptions.

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 uses a clear verb ('Convert') and a specific resource ('datetime'), and explicitly names the two key operations: timezone conversion and format conversion, including Unix timestamps. It is distinguishable from all sibling tools, none of which involve datetime manipulation, though it doesn't explicitly name a sibling it is not.

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: whenever a datetime needs conversion between timezones or formats. However, it provides no explicit guidance about when not to use it, no mention of alternative tools (though none are obvious among siblings), and no context on use cases such as parsing user-supplied datetimes or normalizing stored timestamps.

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