sync_cronometer

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

No annotations are provided, so the description carries full burden. It discloses that the tool downloads and saves files, mentions the output directory default and environment variable, but does not address authentication requirements, rate limits, or side effects like overwriting existing files. It adds some behavioral context but is not comprehensive.

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 concise (9 lines) with a front-loaded summary followed by details and parameter explanations. Every sentence adds necessary information without redundancy.

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 explains the action, output types, parameters, and directory configuration. Given the tool's complexity (4 optional parameters, local file output), it covers most essential aspects. It could mention overwrite behavior or prerequisites, but overall it is fairly complete.

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%, so the description must compensate, and it does excellently. Each parameter is given a clear format, default, and meaning (e.g., 'start_date: Start date as YYYY-MM-DD (defaults to `days` ago)'). This adds substantial value beyond the schema titles.

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 verb ('Download Cronometer data and save locally'), the resource ('Cronometer data'), and the output format ('JSON + food-log.md'). It distinguishes itself from sibling tools (mostly get_/add_ operations) by emphasizing the local storage 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 description implies a use case for downloading and saving data locally, but it does not explicitly provide when to use this tool versus alternatives like get_daily_nutrition or export_raw_csv. No exclusions or alternative recommendations are given, leaving the agent to infer the appropriate context.

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