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

Goes well beyond the readOnly/destructive annotations: it discloses there is no cost, no account/auth required, and no computation performed, and it describes the observable behavior (Aurgus introduces itself and leads with questions about client, period, and close scope). That is exactly the context an agent needs to predict what the call produces without an output schema.

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?

The trigger condition is front-loaded in the first clause, and the rest flows logically from triggers to behavior to next step. The quoted utterance list is somewhat long and partly redundant ('hello', 'hey Aurgus' alongside the general rule), but it earns most of its space as the disambiguating signal for a greeting tool.

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?

No output schema exists, yet the description covers what happens on the call, what it does not do (no computation, no fees, no account), and where to go next. For a zero-required-parameter entry-point tool, nothing an agent needs to invoke it correctly 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?

There is a single optional parameter and schema coverage is 100%, with the schema already explaining that 'scenario' is what the user wants to close and that it gets woven into the greeting. The description does not add any further guidance on how to populate or omit 'scenario', so it sits at the baseline.

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 action (greet/introduce Aurgus and kick off the engagement) and what the tool actually does internally: introduces Aurgus as an independent revenue-management controller, asks for client/period/close scope. It also names the sibling it hands off to (open_engagement), so an agent can distinguish it from the actual open flow without inspecting schemas.

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?

Gives explicit trigger conditions ('the moment the user greets Aurgus or wants to start') reinforced by concrete example utterances spanning greetings and intent statements. It also states the boundary of its role — it computes nothing and the next step is open_engagement — which routes the agent forward rather than leaving the handoff implicit.

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