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

Annotations only flag readOnly=false, destructive=false, openWorld=true; the description adds substantial non-obvious behavior: tracker is created if absent, domain membership is enforced, the 1,800-URL cap silently skips and reports overflow, and new entries land in a 'pending' state. This is exactly the kind of side-effect and state-transition detail annotations cannot express.

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?

Three sentences, front-loaded with the core action, then constraints, then next-step guidance. Every sentence carries distinct, load-bearing information with no redundancy.

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?

An output schema exists so return-value explanation is unnecessary, and the description still covers creation behavior, the domain constraint, the cap edge case, and the resulting URL state. An agent has everything needed to call it correctly and interpret the outcome.

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 0%, so the schema alone leaves the two parameters under-explained. The description compensates by clarifying that each URL must belong to the property's domain and that the 1800 limit is enforced with skip-and-report semantics rather than schema-level rejection, though it does not say what siteUrl format (property vs. full URL) is expected.

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 ('Adds URLs to the GSC Wizard Indexing Tracker for a property') and includes the auto-creation scope detail. It also names the follow-up sibling check_tracked_url_now, letting an agent distinguish this ingest tool from the inspection 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?

Provides clear operational context: URLs must belong to the property's domain, the 1,800 cap causes skips that are reported, and newly added URLs can be inspected via check_tracked_url_now rather than waiting for the hourly cron. It stops short of an explicit when-not-to-use statement (e.g., versus submit_indexnow_urls), so it falls just short of 5.

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