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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, destructiveHint=false), so the bar is lower. The description still adds genuinely new behavior: that supplying a credential causes each of your own comments to carry `mine: true`, which explains why the caller would authenticate and how delete-eligibility is determined. It does not cover ordering or pagination, but the added context is substantive.

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?

Two short sentences, front-loaded with the resource and scope, with no filler. The second sentence is longer but carries real information about credential-dependent output rather than padding.

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 single-parameter read tool with no output schema, the description should say enough about the returned comment set, and it only covers the `mine` flag plus the implicit list of comments. Ordering, empty-result behavior, and whether comments are nested or flat remain unstated, so it is adequate but not complete.

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?

Only one parameter (id) and schema description coverage is 100%, so the schema fully documents that the ID is a catalog channel ID with an example. The description adds nothing about the parameter, which is acceptable at this coverage level but earns no extra credit.

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 phrase 'The community comments about a channel' identifies the resource and implies retrieval, matching the list_comments name, but uses no explicit verb and never distinguishes itself from siblings like post_comment or delete_comment. An agent can infer the reading role, but the definition does not state it.

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?

There is no guidance on when to call this versus get_channel, chat_history, or the comment write tools. Usage is left entirely to inference from the name.

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