Unsplash Photo Statistics

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the description's 'read-only' adds little. It does add context about the default 30-day window and aggregate counts, but it does not disclose response shape or clarifies clamping behavior. No contradictions exist.

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 with no filler. The key operation, data granularity, and default window are all front-loaded in the first sentence, and 'read-only' is a useful one-word safety signal.

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 simple read-only tool with two documented parameters and no output schema, the description is largely complete. It could say a bit more about expected return values, but the purpose and call context are clear enough.

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?

Parameter schema coverage is 100%, so id and quantity are already documented. The description's phrase 'last N days (default 30)' adds minimal value beyond the schema, and it does not resolve the schema's confusing maximum/clamp mismatch.

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 a specific verb ('get'), a specific resource ('download and view totals for a photo'), and a clear time window ('over the last N days'). This distinguishes it from siblings like user statistics or collection/topic 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?

It clearly implies when to use the tool, but it does not explicitly exclude alternatives or name related tools such as unsplash_user_statistics or unsplash_total_stats. The guidance is implicit rather than explicit.

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