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

Annotations already flag destructiveHint/openWorldHint, but the description adds real behavioral context beyond them: saving may fire an alert immediately unless this panel alerted within the last hour, later sends follow scheduled fetches, and change+both defaults remove a custom rule. That is exactly the side-effect and debounce information an agent needs before mutating.

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 core action and the constraint list, roughly 70 words with no filler. The dense semicolon/colon phrasing is efficient but makes it read like a spec dump rather than prose, costing some scannability.

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-parameter mutating tool with no output schema, it covers side effects, timing, defaults, and what it does not affect. The remaining gap is failure behavior (invalid panel index, out-of-range limit) and any permission requirements, which are not addressed.

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 applies; the description mostly restates trigger and notify value sets already in the schema. It does add one genuine clarification — panel is an index into the 'live spec' — and the above/below→limit dependency, but the schema already flags limit as required for above/below.

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 ('Set') on a specific resource ('when one dashboard panel sends alert email and/or a webhook'), scoping it to a single panel rather than the dashboard. This cleanly separates it from set_alert_webhook and set_stale_alert without needing the 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 the default behaviour (trigger=change, notify=both) and the constraint that above/below require a limit, plus a notable default-collapses-to-removal caveat. It also bounds the tool ('does not change colour lines or save a dashboard version'), implicitly routing version changes to publish_dashboard_version, though it never names a sibling explicitly.

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