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

Annotations supply only destructiveHint=true, so the description carries most of the behavioral burden and does so usefully: it discloses that is_internal=false produces a reply the end user sees, a real side effect an agent must reason about. It says nothing about permission requirements, whether a technician and end-user identity can be combined, or rate limits, so it is not fully transparent.

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 sentences, no padding. The core action leads, and the mode split plus is_internal semantics follow immediately, with the endpoint tacked on as a cheap identifier.

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 7-parameter mutation tool with no output schema, the description covers purpose, the authoring-mode fork, and the visibility flag, which is what an agent needs to call it correctly. Edge cases such as supplying both technician_id and enduser_id, or error behavior, remain unaddressed.

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 already 100%, so the baseline is 3, but the description adds meaning the schema does not: it frames technician_id and enduser_id as mutually exclusive authoring modes rather than independent optional fields. It does not clarify the interaction between timestamp_utc and technician_email beyond what their own descriptions carry.

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 (add) and resource (comment on a ticket) and even names the backing endpoint, POST /api/v3/tickets/{ticketId}/comments. It is immediately distinguishable from the sibling atera_list_ticket_comments, which reads rather than writes comments.

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 gives concrete routing guidance for the two authoring modes: as a technician via technician_id, or on behalf of an end user via enduser_id, with is_internal controlling visibility. It stops short of any explicit when-not-to-use or alternative-tool statement (e.g., when to prefer atera_update_ticket instead).

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