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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that — no indication of how rows are ordered, whether results are aggregated or truncated, or what a breakdown output looks like, which matters for a 13-parameter reporting tool.

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 with no filler, so it is maximally concise. That conciseness is also its weakness: the space saved is not redirected to any qualifying detail an agent would need.

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 13-parameter, six-enum analytics tool with no output schema and no annotations covering output shape, one sentence is far short of adequate. It says nothing about default date behavior, how site/folder/language scoping combine, or what the returned breakdown contains.

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 77%, just under the high-coverage threshold, so the schema already carries most parameter meaning through its detailed text and six enums. The description merely echoes the dimension enum values (country, device, search appearance, date) without explaining interactions such as dimension plus detail or the site-vs-folder scoping choice.

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 ('Break organic performance down') plus the four available breakdown dimensions, so the agent knows exactly what the tool produces. It never distinguishes itself from siblings like gsc_performance, gsc_queries or gsc_pages, leaving the agent to infer which Grader Search Console tool to pick.

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 offers no when-to-use guidance, no exclusions and no mention of alternatives. The only contextual steering ('summary is right for a quick look, full only for a complete report') lives in the input schema's detail property, not in the description itself.

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