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

Annotations already declare readOnlyHint=true and supply a title, so the safety profile is covered and the bar is lower. The description adds nothing beyond that — it doesn't say what fields "full details" includes or what happens when the id is unknown — but it also contradicts nothing.

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?

A single short sentence with the resource scope front-loaded and zero filler. Nothing is wasted or buried.

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?

The schema and annotations make the call mechanics unambiguous, but with no output schema the description's phrase "full details" is the only clue to the return payload and it stays vague. Adequate for invocation, thin for interpreting the result.

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% and the single channel_id parameter is fully documented in the schema, including its UUID format and the pointer to mIRC_list. The description only reinforces "by id", so baseline 3 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?

States a specific verb and resource ("Get full details of a single channel") and scopes it to one item by id, which implicitly separates it from the sibling list tool mIRC_list. It doesn't explicitly name which sibling to prefer, but the singular/plural scope distinction is clear enough to select correctly.

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 contains no when-to-use or when-not-to-use guidance and never mentions mIRC_list, mIRC_discover, or mIRC_list_messages as alternatives. The only routing hint ("Use mIRC_list to discover available channels") lives in the schema's channel_id description, not in the tool description itself.

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