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

With no annotations, the description carries the full burden and does well: it discloses the teaser limitation, the alternative auth paths, the needs_auth + human connect URL fallback, and that the tool is rate-limited. Return contents beyond the auth signal are not described, but the behavioral surface is otherwise well covered.

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?

Front-loaded with what the tool is, then the pricing/preview constraint, then auth behavior, then rate limiting. Dense and every sentence carries information, though the telegraphic style leaves some clauses under-explained.

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 5-param, no-annotation, no-output-schema tool, the description still omits site_url and idempotency_key behavior and never says what the teaser report actually returns (only the auth-failure signal). It is adequate on auth and limits but incomplete on the core deliverable.

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 60%, and the description adds real meaning to access_token (only needed for sites that aren't an owned adapter property; bound properties need no token) and implies gsc_site_url's role. It says nothing about site_url or idempotency_key, so a portion of the parameters remain unexplained.

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 product and scope ('Public free Search Repair Radar teaser') and immediately distinguishes it from the paid $29/mo repair packet, so an agent understands this is a preview-only tool. It is product-flavored rather than a plain verb+resource, but the intent is unambiguous.

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 conveys the usage context (free preview, never unlocks paid) and the auth decision tree (owned bound property uses its GSC bind; other sites need access_token or get needs_auth). However, it never explicitly compares against sibling radar tools or states when NOT to use it beyond the teaser limitation.

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