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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered by structured data. The description adds useful return-shape context (position deltas, URL, country, device) but says nothing about scoping limits, pagination, or row caps for a read tool. Adequate but not rich.

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?

A single compact sentence that front-loads the core purpose and tucks the return fields into a parenthetical. Zero filler and nothing to trim.

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 takes on part of the return-documentation burden and does so by enumerating the key returned fields. For a one-parameter read tool whose annotations cover safety, this is nearly complete; only sorting, scope limits, and volume are unaddressed.

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?

Only one parameter (site_id) and schema coverage is 100%, so the schema fully documents it. The description adds no additional meaning about the parameter (e.g., format or where to obtain the UUID). Baseline 3 is appropriate when the schema does the heavy lifting.

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 names a specific verb+resource ('Tracked keyword positions') and enumerates the returned fields (current + previous position, URL, country, device), so the agent knows exactly what data comes back. It does not, however, explicitly contrast itself with close siblings such as get_keyword_gaps, get_rank_alerts, or start_ranking_run.

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?

There is no when-to-use or when-not-to-use guidance and no alternative named. The word 'tracked' subtly implies it only covers keywords already being tracked (as opposed to start_ranking_run which would initiate tracking), but the agent must infer that on its own.

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