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

With no annotations provided, the description carries the full burden of behavioral disclosure. It thoroughly explains that no e-mail is sent, the 5-minute cron conversion, the one-per-24h cap, that failure is not proof of life, and that it works by GET or POST. This is exemplary transparency.

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?

The key fact—'Says the run FAILED'—is front-loaded, but the description repeats the e-mail/cron/alert-cap behavior almost verbatim in two consecutive passages. This redundancy makes it longer than necessary and violates the 'every sentence earns its place' principle.

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?

Given one simple parameter, no output schema, and no annotations, the description covers all essential behavior: what the call records, how and when the alert is generated, the rate cap, the liveness semantics, and the HTTP methods. Nothing critical 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 description coverage is 100% and the single `id` parameter is already documented as the Monitor ID from `Monitor.ingest_url`. The description does not add parameter-specific semantics, but the schema already covers it, matching the baseline.

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?

The description opens with a specific verb and resource: 'Says the run FAILED' via a monitor id. It clearly conveys the tool's function and is easy to distinguish from sibling tools like signal_start and signal_exit_code, though it never explicitly names 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?

The description provides clear behavioral context: calling this tool records an alert_pending state, the cron converts it to an alert with reason 'fail' within 5 minutes, and it is subject to a one-per-24h cap. It does not explicitly state when not to use it or mention alternatives, so it falls short of a 5.

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