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

Annotations already cover readOnlyHint, idempotentHint, and destructiveHint, so the safety profile is known. The description adds useful behavioral context by naming the supported channel types and noting that a key is required, which goes beyond the annotations. It does not contradict any annotation.

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 two short sentences and includes the essential information: what the tool returns and the auth requirement with a documentation link. It is not verbose, though the phrasing 'The notify channels this mite has' is slightly awkward and could be more direct.

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 zero-parameter, read-only listing tool, the description is mostly complete: it names the possible channels and the key requirement. Since there is no output schema, it could better describe the response shape, but the core usage is clear enough for an agent to call the tool.

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?

The input schema has zero parameters and schema description coverage is 100%, so the baseline is 4. The description has no parameters to clarify, and its mention of a key is an authentication requirement rather than a tool parameter, which is appropriate.

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 and title make clear that this tool lists the notification channels (telegram, discord, webhook) configured for the current mite, and the tool name 'list_channels' supplies the verb. It is distinguishable from siblings like set_webhook and remove_channel because it describes viewing existing channels, though it does not explicitly contrast itself with those alternatives.

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 gives no explicit guidance on when to use this tool versus alternatives such as set_webhook, remove_channel, or list_rules. The purpose is implied by the title, but there is no statement like 'use this to see current alert destinations' or 'use set_webhook to change them.'

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