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

Annotations supply only destructiveHint=true, and the description does add the meaningful default-privacy behavior plus the underlying REST call. But the privacy default is also already stated in the schema for `private`, and the description says nothing about notifying agents, permissions required, or what the mutation affects.

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 action, followed by the one non-obvious behavioral caveat and the endpoint. No filler or redundancy.

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 four-parameter mutation tool with no output schema, the description plus the 100%-covered schema gives an agent enough to call it correctly. Minor gaps remain around notify_emails side effects and whether the note triggers customer-visible notifications.

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 all four parameters (id, body, private, notify_emails) are fully documented in the schema. The description's private/default remark duplicates the schema text and adds no format or constraint detail beyond it; baseline 3 applies.

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?

Specific verb+resource ('Add a note to a ticket') and a clear scope statement about default privacy. It implies a distinction from the public-reply sibling but never names freshdesk_reply_ticket, 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?

The description conveys the key usage condition (internal by default; set private:false for a public note), which implicitly separates this from reply-ticket workflows. However, it never states when to use this tool versus freshdesk_reply_ticket, nor any prerequisites or exclusions.

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