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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=false. Beyond those, the description adds two things the annotations do not: the auth requirement ('Requires: token') and the fact that the response carries a ticket `code`. It does not warn that repeated calls create duplicate tickets (relevant given idempotentHint=false), which keeps it from a 5.

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: what it does, what is required/optional, what comes back and where to use it. Front-loaded with purpose, and every clause carries information the agent needs.

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?

With no output schema, the description helpfully names the returned `code`, and it flags the token requirement, so an agent has enough to call and chain the tool. Minor gaps remain (error/permission failure cases, whether service_id must belong to the caller), but nothing blocking.

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 subject/message/service_id are already fully documented with lengths, format and examples in the schema. The description only restates required vs optional status, adding no new syntax or constraint detail. 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?

The description states a specific verb+resource ('Open a support ticket with EQVPS') and immediately differentiates itself from the read/mutate siblings by naming the follow-on tools (get_ticket / reply_ticket / close_ticket). An agent can distinguish it from list_tickets or get_ticket without opening any 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?

It gives clear workflow context: the returned `code` is the handle to use with get_ticket / reply_ticket / close_ticket, which tells the agent where this tool sits in the lifecycle. It does not explicitly state when NOT to use it (e.g. to reply to an existing ticket use reply_ticket), so it falls short of the full 5.

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