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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), and the description adds substantial meaning on top: result ordering and the semantics of the paused flag (plan has no weekly checks, or this check isn't among the plan's oldest sites). That 'why is it paused' explanation is exactly the kind of behavior an agent cannot infer from any structured field.

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 the resource and ordering, and every clause about the returned item fields is load-bearing. The long nested parenthesis explaining the paused state is informative but makes the second half dense and slows parsing.

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, yet the description still adds semantic value by explaining what the paused flag means and how last_run connects to get_crawl/create_zip. For a zero-param list tool with annotations and an output schema, nothing an agent needs is missing.

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?

Zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. The parameter names it does mention (last_run.id, crawl_id) belong to sibling tools, where they usefully tell the agent how to wire the chained calls.

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?

Names the specific resource (the account's weekly site checks) and pins down ordering ("oldest first"), so 'monitors' is resolved to a concrete object. It also distinguishes itself from get_crawl/create_zip by scoping those to follow-up calls rather than duplicating them.

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?

Explicitly routes the agent onward: get_crawl with last_run.id for a run's pages and report, create_zip with crawl_id for the changed images. That's clear contextual guidance, though it never states when to prefer monitor_site or stop_monitor over listing, so no explicit exclusion is given.

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