Garmin sync status

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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real content beyond that: it enumerates headers such as per-domain date range, day counts, all-history flags and last successful sync, and mentions error reporting. It stops short of saying how partial or failed syncs are represented.

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?

Two short sentences, front-loaded with what is shown, followed by a compact enumeration of returns. Every clause carries information, though the 'Returns:' block is a dense run-on that could be structured more crisply.

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?

With no output schema, the description carries the burden of describing return values, and it does so across sync-level and per-domain detail. It is only slightly incomplete in omitting the response_format choice and how a failed or never-run sync is reported.

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% with a single optional response_format enum, so the schema already documents the only parameter fully. The description adds nothing about format selection, so the baseline of 3 applies.

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?

States a specific verb and resource: it shows the contents of the local Garmin cache plus the progress of the current or last sync. That is clear enough to act on, but the description never distinguishes this from the close sibling garmin_status or from garmin_sync, which an agent could plausibly pick instead.

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?

Usage is only implied: an agent can infer this is the tool to call before or after garmin_sync to check coverage and errors, but the description never says when to use it, when not to, or which sibling it replaces. No prerequisites or exclusions are given.

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