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

Annotations declare a non-read-only, non-idempotent, non-destructive write, and the description adds real context annotations cannot: the enquiry is delivered by e-mail to a named human, that human replies to the supplied contact, and no credentials are required. It stops short of warning that repeat calls (idempotentHint=false) will send duplicate enquiries.

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?

Four short sentences, front-loaded with the action and recipient, then the outcome, then the usage restriction and auth note. Nothing is padding; each clause carries a distinct decision-relevant fact.

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 seven fully documented parameters and no output schema, the description only needs to supply what the schema cannot: recipient identity, delivery channel, reply path, auth requirements and a usage gate, all of which it covers. The remaining gap is duplicate-send behavior implied by idempotentHint=false.

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 100%, so all seven parameters are already documented, which sets the baseline at 3. The description does clarify the semantics of 'contact' ('He replies to the contact you give') and 'represents' ('the person or company you act for'), but it adds no format or validation guidance beyond the schema.

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 (introduce / pass an enquiry) and a concrete destination (Nikola Mishev, founder of Brand Design Ltd., by e-mail), plus who the agent speaks for. That is enough to separate it from transactional siblings like create_order or start_payment, though no sibling is named explicitly.

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 a real gating condition: 'Use it only when your principal wants to be contacted.' That is a genuine when-to-use constraint most definitions lack. It does not name an alternative path (e.g. concierge-first), even though the schema's 'session' parameter implies one exists.

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