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

Goes well past the annotations (destructiveHint=true, idempotentHint=true) by disclosing the actual blast radius: checks, content checks and dependencies stop, DNS watch alerts are held, open automatic incidents resolve, and cron jobs keep alerting until individually paused. It also states the non-obvious constraints that pausing frees no plan room and resuming must fit the plan's active monitors — exactly the side effects an agent needs before committing a destructive call.

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 usage trigger before the behavioral detail, and nearly every clause carries distinct information. It is a single dense sentence chain, and the lead-in 'Returns the new state and what it means' is slightly awkward phrasing for what follows, but there is no filler.

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?

Only 3 flat parameters at full schema coverage and no output schema, so the description's job is behavioral and it covers it fully: preconditions, cascade effects, what cron monitors do, plan-capacity implications, and explicit pointers away from the tool. Nothing an agent needs to call this destructive, idempotent operation correctly 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?

Schema coverage is 100%, so the baseline is 3; the description earns an extra point by explaining the semantic difference between the site-level and check-level scope (site pausing cascades to checks and dependencies, cron jobs are separate). It does not add matching/format hints beyond the schema's 'id, name or part of its URL', but the cascade semantics are real added meaning.

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 pair (stop/restart) on a specific resource (checks of a site or one of its checks) and immediately scopes it against siblings: 'Not for scheduling maintenance windows or deleting a monitor.' An agent can distinguish this from update_monitor, apply_bulk_pause, and schedule_maintenance without opening any schema.

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?

Gives a concrete triggering condition ('when the user wants to stop or restart checks... for example during planned work') plus explicit exclusions (maintenance scheduling, deletion) redirected to the dashboard. It stops short of naming the in-product sibling apply_bulk_pause or schedule_maintenance as the alternative for bulk/planned-work cases, which would have made routing unambiguous.

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