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

Annotations already declare this is a non-readonly, non-idempotent, non-destructive mutation. The description adds important behavior beyond that: webhook registration returns a new signing secret once, empty url turns alerts off, and test broadcasts a test alert. It does not mention auth requirements or persistence scope beyond the test description.

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 description is compact and front-loads the channel choices, with no wasted words. However, the telegraphic fragment structure ('channel slack...') is slightly harder to parse and omits an explicit subject or verb.

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 two-parameter configuration tool with an output schema and annotations, the description covers the important modes, url behavior, webhook side effect, and test behavior. An agent has enough to select the right channel and set or clear the destination correctly.

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 0%, so the description must carry parameter meaning. It fully explains the channel values (slack, protection_slack, webhook, test) and the url semantics, including that url accompanies webhook setup and an empty url disables alerts.

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 identifies the alert-routing resource and enumerates the supported channels, so it is clear this configures where alerts are delivered. It is a sentence fragment rather than a clean verb+resource statement, and it does not explicitly name get_alerts as the read-only sibling, but the setter role is still inferable.

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?

It gives actionable guidance per channel: protection_slack is for incidents and misuse instead of slack, webhook requires a url and returns a new signing secret once, an empty url disables alerts, and test sends a test alert everywhere. It does not explicitly say when not to use it or point to get_alerts for viewing current settings.

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