withings_sync

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

With no annotations, the description carries the full burden. It discloses incremental sync behavior, first sync history fetching, storage in SQLite, and return summary. Missing minor details like API rate limits or authentication, but still 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 well-structured with a clear heading, paragraphs, bullet points, and explicit sections for args and returns. It is concise yet complete, with no wasted words.

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 no annotations and an output schema, the description covers purpose, usage guidelines, parameter semantics, behavioral details, and returns. It fully equips the AI agent to select and invoke the tool correctly, even in the context of sibling tools.

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 add full meaning. It explains data_types options with examples and default, and clarifies that 'days' applies only to the first sync. This adds significant value beyond the raw schema.

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 tool's purpose: 'Sync Withings health data to the local cache.' It uses a specific verb-resource pair and explicitly distinguishes from sibling query tools like withings_get_body and withings_get_sleep.

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 provides explicit guidance: 'Run this before using other withings_get_* tools' and 'Not for querying data - use withings_get_body, withings_get_sleep, withings_get_activity, or withings_get_workouts instead.' It clearly tells the AI agent when and when not to use the tool.

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