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

Annotations already declare the safety profile (mutating but non-destructive, closed-world). The description usefully adds a non-obvious side effect — the conversation is created when absent — which annotations cannot convey. However, it is silent on whether the posted comment is editable, permission requirements, and why a comment-creating tool accepts limit/createdAfter/createdBefore, suggesting it also returns a comment list.

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 primary action, and the side-effect caveat follows immediately. No filler.

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 description covers the core action and the auto-creation side effect, and annotations carry the safety profile with no output schema needing explanation. The gap is the unexplained read-back parameters, which leave an agent unsure whether the call returns a comment list and how filtering applies.

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 description coverage is 100%, so the baseline is 3; the schema fully documents the 6 parameters. The description adds no parameter-level meaning and notably does not explain the presence of read-oriented filters (limit, createdAfter, createdBefore) on a write tool.

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 ('Add a text comment to a transaction conversation') plus the AcDocument conversation auto-creation behavior. It implicitly contrasts with the read-only sibling get-transaction-conversation, but never names it, so sibling differentiation is left to inference.

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 implied by the verb: use this to post a comment rather than read one. There is no explicit when-to-use statement, no mention of when to prefer get-transaction-conversation, and no prerequisites or exclusions.

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