zendesk_add_comment

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

No annotations are provided, so the description carries the full behavioral burden, and it does little: it does not state that a public reply notifies the requester while an internal note does not, nor whether the agent must authenticate, nor what happens on an invalid ticket id. It adds one visibility-related fact (public or internal) but no mutation side effects or failure behavior.

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 front-loaded sentence with zero filler; the action target is stated first and nothing is redundant.

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 credential-bearing mutation tool with no annotations and no output schema, the description omits too much: no side-effect disclosure, no auth framing, no error behavior. The schema covers parameters, but the behavioral context an agent needs to invoke this safely is missing.

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% with all six parameters documented in the schema, so per the rubric the baseline is 3. The description's mention of 'public or internal' echoes the schema's own public parameter description and adds no syntax or format detail beyond it.

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 states a specific verb+resource ('Add a ... comment to a Zendesk ticket'), making the action unambiguous. It is obviously distinct from its read-only siblings (zendesk_get_ticket, zendesk_list_tickets, zendesk_search), but it never names or contrasts them explicitly, so it stops short of a 5.

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?

There is no when-to-use guidance, no when-not-to-use guidance, and no mention of alternatives or prerequisites (e.g., that credentials/ticket_id must already be valid). The public/internal distinction exists only as a schema default, not as decision guidance.

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