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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds behavioral context by listing the return blocks and explaining how the include parameter filters them, which is useful beyond the annotations. 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 sentences with zero waste. The first sentence front-loads the primary content (what the tool returns), and the second explains the optional parameter. Every word 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?

Given the low complexity (one optional parameter), the presence of an output schema (so return format is documented elsewhere), and annotations covering safety, the description is complete. An agent can call this tool correctly without missing information.

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 coverage is 100% for the only parameter (include), with a clear description of its enum values and default behavior. The description's sentence about include essentially restates the schema ('Pass include to keep only some of those blocks') without adding new meaning. Per the rubric, baseline 3 applies 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 clearly states the resource (site overview) and enumerates the content blocks (totals, photographers, categories, years, sections, license). It is specific and unambiguous, and the name + description make it distinct from the photo-focused sibling tools (get_photo, search_photos, etc.).

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 implicitly signals usage context by focusing on site-wide statistics, which contrasts with the photo-specific siblings. However, it does not explicitly state 'use this for site overview, not individual photos' or mention any exclusions. The context is clear enough for an agent to route correctly, but the guidance is not explicit.

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