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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so the safety profile is covered by structured data. The description adds that retrieval is keyed off a share link and enumerates the returned structure, which is real added value, but it says nothing about ordering, pagination, empty threads, or what happens with an expired/revoked link. That leaves the operational behavior only partially disclosed.

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 sentence with the action and resource front-loaded, followed immediately by the payload enumeration. There is no filler, no restatement of the tool name, and every clause carries information the agent can act on.

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 one-parameter read tool with no output schema, the description covers return contents well and annotations carry the risk profile, so an agent can call it confidently. The only shortfall is the absence of any note on ordering, pagination, or failure behavior for invalid links, which for a comment-listing tool would matter on large threads.

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% for the single 'link' parameter, and the schema already spells out the full URL form and that admin links are refused. The description's phrase 'from its share link' merely restates that, adding no format or precedence detail beyond the schema, so this sits at the documented baseline of 3.

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 gives a specific verb ('List') and resource ('comments on an mdshare document') and then enumerates exactly what each comment contains (author, text, anchor passage, replies, resolved flag). The resource noun alone separates it from read_document (document content) and get_versions (version history), so an agent can route correctly without opening any 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?

Usage is only implied: the description makes clear this is the tool for reading comment threads off a share link, but it never states when to prefer it over siblings or any preconditions beyond what the schema already says. No exclusions or alternative-selection guidance is offered in the description itself.

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