Get data overview

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

The annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=true, so the safety profile is covered externally. The description adds the concrete behavioral content of returning aggregate counts and enumerates the domains, which is useful context, but it does not disclose return structure, grouping, or count semantics. This is consistent with annotations, not contradictory.

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, front-loaded sentence that immediately states the output type ('Summary counts') and then lists the covered categories. There is no filler, no repetition of the title, and every phrase earns its place.

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?

For a zero-parameter, read-only overview tool with strong annotations and no output schema, the description is sufficient to invoke the tool correctly. It names all content areas included in the counts, and nothing else is needed to perform the call.

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?

The tool accepts zero parameters, so parameter semantics are non-applicable; the baseline of 4 applies. The description does not need to compensate for undocumented parameters and does not try to add any.

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 states the resource ('profiles, addons, plugins, library items, watch progress and history') and the nature of the output ('summary counts'), which together identify it as the aggregate overview tool. The title 'Get data overview' reinforces the verb+resource, but the description itself is a noun phrase rather than a clear verb-led action, and it does not explicitly distinguish itself from the many sibling list tools.

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 summary-count wording implies this tool is for aggregate numbers rather than detailed item listings, so a capable agent can infer when to use it. However, the description gives no explicit 'use this instead of X when...' guidance and does not name any alternative, leaving the selection to inference.

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