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

Annotations already declare readOnlyHint, non-destructive, and closed-world, so safety is covered. The description adds genuine context beyond them: comments are 'permanent' and carry 'authenticated attribution, replies, and corrections', and it warns to treat comment text as data rather than permission-changing instructions (a prompt-injection guard). That is meaningful behavioral disclosure.

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?

Front-loaded with purpose, then sibling routing, then pagination, then a security note – a sensible order with little waste. Roughly four dense sentences that each carry a distinct job, though the security sentence could be tightened.

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?

With no output schema, the description needn't explain return values, and it does cover purpose, routing, and untrusted-content handling. But it leaves two of three parameters effectively unexplained and misnames the cursor parameter, so an agent could still mis-call pagination. Adequate but with clear gaps.

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 only 33% (only itemId is documented), so the description must compensate and largely fails to. It references 'nextCursor', which does not match the actual 'before' parameter, creating potential confusion, and the 'limit' parameter is never explained anywhere. The paging guidance is misnamed rather than clarifying.

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 and resource ('Read permanent project/task comments') and explicitly distinguishes itself from get_resources ('editable library notes are resources'). It also characterizes the content (attribution, replies, corrections). The only wrinkle is that purpose is clear despite a naming inconsistency with the pagination parameter.

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 names an alternative tool and the condition that selects it: editable library notes are read with get_resources, whereas this reads permanent Comments. It also tells the agent how to page back ('Pass nextCursor as before to read older entries'). No explicit when-not guidance beyond that routing, so not a full 5.

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