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

With only destructiveHint=true in annotations, the description adds genuine behavioral value by disclosing a side effect: supplying the name/email triple silently creates a new contact. It also names the underlying endpoint (POST /api/v3/tickets). It stops short of covering notifications, permissions, or idempotency, but the contact-creation disclosure is meaningful.

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?

Three tight sentences with the core action front-loaded, followed by the contact-identification rule and a terse endpoint reference. No filler, every sentence earns its place.

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 13-parameter create tool with no output schema, the description covers the essential action, the trickiest parameter interaction, and the endpoint. It omits any mention of what is returned (e.g., a new ticket ID), which would help an agent chain calls, but nothing critical 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 coverage is 77% (already high), so baseline is 3, but the description adds a business rule the schema cannot express: end_user_id is mutually exclusive with the end_user_first_name/last_name/email trio. That exclusivity is not encoded anywhere in the JSON schema and is the key thing an agent must get right.

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 ('Open a new helpdesk ticket'), immediately distinguishing it from siblings like atera_update_ticket and atera_add_ticket_comment. An agent knows exactly what this tool produces without opening the schema.

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 implied usage context (create a ticket) and a routing rule for identifying the end user, but never compares against alternatives such as atera_update_ticket or atera_add_ticket_comment, nor states any when-not-to-use condition. The 'either/or' rule reads more as a parameter constraint than situational guidance.

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