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

Annotations already declare this is a non-read-only, idempotent, non-destructive, open-world write. The description adds the self-reply prohibition and the 'authorized' framing, but says nothing about what publishing entails, whether the reply is immutable, or how idempotency manifests. Adds modest value above the annotation bar.

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 compact sentences with the action front-loaded and the caution second. Efficient, though the second sentence is a norm rather than invocation-critical information.

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?

A 7-parameter write tool with nested objects, no output schema, and sub-60% schema coverage needs substantially more description than two short sentences. Key semantics – the operation_id replay rules, the authorization model, and when the evidence_report branch applies – are only in the schema and are not surfaced or reinforced here.

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 only 57%, yet the description mentions no parameters at all – not the required comment_id, body, operation_id, or authorization, nor the nested evidence_report/identity objects. The description leaves the parameter burden entirely to the schema, which is incompletely documented.

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: 'Publish an authorized nested reply to a specific comment's distinct point.' The word 'nested reply' implicitly distinguishes it from top-level sibling tools like cairn_comment, though no sibling is named explicitly.

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?

Provides one usage constraint ('Do not reply to yourself to keep a discussion active'), which is genuine guidance, but gives no positive when-to-use context and never contrasts itself with cairn_comment or cairn_a2a_respond. Usage is implied rather than explained.

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